Home / 28,101.28-42,185.88-13,122.64

Finding the Fourth Proportional to 28,101.28, 42,185.88 and 13,122.64

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Solution

The fourth proportional to 28,101.28, 42,185.88 and 13,122.64 is: 19,699.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,101.28 : 42,185.88 = 13,122.64 : x
  2. Step 2: Convert to fraction form
    28,101.28/42,185.88 = 13,122.64/x
  3. Step 3: Cross multiply
    28,101.28x = 42,185.88 × 13,122.64
  4. Step 4: Simplify right side
    28,101.28x = 553,590,116.32
  5. Step 5: Solve for x
    x = 553,590,116.32/28,101.28
  6. Step 6: Final answer
    x = 19,699.82

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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.