Home / 28,385.59-39,172.82-15,810.55

Finding the Fourth Proportional to 28,385.59, 39,172.82 and 15,810.55

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Solution

The fourth proportional to 28,385.59, 39,172.82 and 15,810.55 is: 21,818.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,385.59 : 39,172.82 = 15,810.55 : x
  2. Step 2: Convert to fraction form
    28,385.59/39,172.82 = 15,810.55/x
  3. Step 3: Cross multiply
    28,385.59x = 39,172.82 × 15,810.55
  4. Step 4: Simplify right side
    28,385.59x = 619,343,829.25
  5. Step 5: Solve for x
    x = 619,343,829.25/28,385.59
  6. Step 6: Final answer
    x = 21,818.95

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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.