Home / 28,615.52-39,489.90-15,869.24

Finding the Fourth Proportional to 28,615.52, 39,489.90 and 15,869.24

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Solution

The fourth proportional to 28,615.52, 39,489.90 and 15,869.24 is: 21,899.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,615.52 : 39,489.90 = 15,869.24 : x
  2. Step 2: Convert to fraction form
    28,615.52/39,489.90 = 15,869.24/x
  3. Step 3: Cross multiply
    28,615.52x = 39,489.90 × 15,869.24
  4. Step 4: Simplify right side
    28,615.52x = 626,674,503.23
  5. Step 5: Solve for x
    x = 626,674,503.23/28,615.52
  6. Step 6: Final answer
    x = 21,899.82

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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.