Home / 28,615.10-39,491.15-15,869.54

Finding the Fourth Proportional to 28,615.10, 39,491.15 and 15,869.54

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Solution

The fourth proportional to 28,615.10, 39,491.15 and 15,869.54 is: 21,901.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,615.10 : 39,491.15 = 15,869.54 : x
  2. Step 2: Convert to fraction form
    28,615.10/39,491.15 = 15,869.54/x
  3. Step 3: Cross multiply
    28,615.10x = 39,491.15 × 15,869.54
  4. Step 4: Simplify right side
    28,615.10x = 626,706,403.95
  5. Step 5: Solve for x
    x = 626,706,403.95/28,615.10
  6. Step 6: Final answer
    x = 21,901.25

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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.