Home / 42,572.13-63,858.20-12,990.12

Finding the Fourth Proportional to 42,572.13, 63,858.20 and 12,990.12

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Solution

The fourth proportional to 42,572.13, 63,858.20 and 12,990.12 is: 19,485.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,572.13 : 63,858.20 = 12,990.12 : x
  2. Step 2: Convert to fraction form
    42,572.13/63,858.20 = 12,990.12/x
  3. Step 3: Cross multiply
    42,572.13x = 63,858.20 × 12,990.12
  4. Step 4: Simplify right side
    42,572.13x = 829,525,616.03
  5. Step 5: Solve for x
    x = 829,525,616.03/42,572.13
  6. Step 6: Final answer
    x = 19,485.18

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Half scale
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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.