Home / 28,158.05-38,857.78-15,411.11

Finding the Fourth Proportional to 28,158.05, 38,857.78 and 15,411.11

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Solution

The fourth proportional to 28,158.05, 38,857.78 and 15,411.11 is: 21,267.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,158.05 : 38,857.78 = 15,411.11 : x
  2. Step 2: Convert to fraction form
    28,158.05/38,857.78 = 15,411.11/x
  3. Step 3: Cross multiply
    28,158.05x = 38,857.78 × 15,411.11
  4. Step 4: Simplify right side
    28,158.05x = 598,841,521.94
  5. Step 5: Solve for x
    x = 598,841,521.94/28,158.05
  6. Step 6: Final answer
    x = 21,267.15

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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.