Home / 28,488.29-39,310.45-15,740.71

Finding the Fourth Proportional to 28,488.29, 39,310.45 and 15,740.71

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Solution

The fourth proportional to 28,488.29, 39,310.45 and 15,740.71 is: 21,720.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,488.29 : 39,310.45 = 15,740.71 : x
  2. Step 2: Convert to fraction form
    28,488.29/39,310.45 = 15,740.71/x
  3. Step 3: Cross multiply
    28,488.29x = 39,310.45 × 15,740.71
  4. Step 4: Simplify right side
    28,488.29x = 618,774,255.79
  5. Step 5: Solve for x
    x = 618,774,255.79/28,488.29
  6. Step 6: Final answer
    x = 21,720.31

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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.