Home / 28,615.74-39,490.20-15,869.46

Finding the Fourth Proportional to 28,615.74, 39,490.20 and 15,869.46

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Solution

The fourth proportional to 28,615.74, 39,490.20 and 15,869.46 is: 21,900.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,615.74 : 39,490.20 = 15,869.46 : x
  2. Step 2: Convert to fraction form
    28,615.74/39,490.20 = 15,869.46/x
  3. Step 3: Cross multiply
    28,615.74x = 39,490.20 × 15,869.46
  4. Step 4: Simplify right side
    28,615.74x = 626,688,149.29
  5. Step 5: Solve for x
    x = 626,688,149.29/28,615.74
  6. Step 6: Final answer
    x = 21,900.12

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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.