Home / 28,508.16-39,305.28-18,419.52

Finding the Fourth Proportional to 28,508.16, 39,305.28 and 18,419.52

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Solution

The fourth proportional to 28,508.16, 39,305.28 and 18,419.52 is: 25,395.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,508.16 : 39,305.28 = 18,419.52 : x
  2. Step 2: Convert to fraction form
    28,508.16/39,305.28 = 18,419.52/x
  3. Step 3: Cross multiply
    28,508.16x = 39,305.28 × 18,419.52
  4. Step 4: Simplify right side
    28,508.16x = 723,984,391.07
  5. Step 5: Solve for x
    x = 723,984,391.07/28,508.16
  6. Step 6: Final answer
    x = 25,395.69

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.