Home / 12,990.20-19,485.29-4,670.24

Finding the Fourth Proportional to 12,990.20, 19,485.29 and 4,670.24

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Solution

The fourth proportional to 12,990.20, 19,485.29 and 4,670.24 is: 7,005.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,990.20 : 19,485.29 = 4,670.24 : x
  2. Step 2: Convert to fraction form
    12,990.20/19,485.29 = 4,670.24/x
  3. Step 3: Cross multiply
    12,990.20x = 19,485.29 × 4,670.24
  4. Step 4: Simplify right side
    12,990.20x = 91,000,895.02
  5. Step 5: Solve for x
    x = 91,000,895.02/12,990.20
  6. Step 6: Final answer
    x = 7,005.35

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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.