Home / 15,528.38-21,428.96-8,454.81

Finding the Fourth Proportional to 15,528.38, 21,428.96 and 8,454.81

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Solution

The fourth proportional to 15,528.38, 21,428.96 and 8,454.81 is: 11,667.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,528.38 : 21,428.96 = 8,454.81 : x
  2. Step 2: Convert to fraction form
    15,528.38/21,428.96 = 8,454.81/x
  3. Step 3: Cross multiply
    15,528.38x = 21,428.96 × 8,454.81
  4. Step 4: Simplify right side
    15,528.38x = 181,177,642.58
  5. Step 5: Solve for x
    x = 181,177,642.58/15,528.38
  6. Step 6: Final answer
    x = 11,667.51

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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.