Home / 28,630.47-39,510-15,885.59

Finding the Fourth Proportional to 28,630.47, 39,510 and 15,885.59

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Solution

The fourth proportional to 28,630.47, 39,510 and 15,885.59 is: 21,922.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,630.47 : 39,510 = 15,885.59 : x
  2. Step 2: Convert to fraction form
    28,630.47/39,510 = 15,885.59/x
  3. Step 3: Cross multiply
    28,630.47x = 39,510 × 15,885.59
  4. Step 4: Simplify right side
    28,630.47x = 627,639,463.35
  5. Step 5: Solve for x
    x = 627,639,463.35/28,630.47
  6. Step 6: Final answer
    x = 21,922.08

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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.