Home / 15,156.49-20,918.76-8,787.19

Finding the Fourth Proportional to 15,156.49, 20,918.76 and 8,787.19

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Solution

The fourth proportional to 15,156.49, 20,918.76 and 8,787.19 is: 12,127.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,156.49 : 20,918.76 = 8,787.19 : x
  2. Step 2: Convert to fraction form
    15,156.49/20,918.76 = 8,787.19/x
  3. Step 3: Cross multiply
    15,156.49x = 20,918.76 × 8,787.19
  4. Step 4: Simplify right side
    15,156.49x = 183,817,142.97
  5. Step 5: Solve for x
    x = 183,817,142.97/15,156.49
  6. Step 6: Final answer
    x = 12,127.95

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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.