Home / 28,011.39-38,655.51-15,436.14

Finding the Fourth Proportional to 28,011.39, 38,655.51 and 15,436.14

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Solution

The fourth proportional to 28,011.39, 38,655.51 and 15,436.14 is: 21,301.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,011.39 : 38,655.51 = 15,436.14 : x
  2. Step 2: Convert to fraction form
    28,011.39/38,655.51 = 15,436.14/x
  3. Step 3: Cross multiply
    28,011.39x = 38,655.51 × 15,436.14
  4. Step 4: Simplify right side
    28,011.39x = 596,691,864.13
  5. Step 5: Solve for x
    x = 596,691,864.13/28,011.39
  6. Step 6: Final answer
    x = 21,301.76

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Half scale
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Double scale
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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.