Home / 15,528.43-21,428.15-8,814.19

Finding the Fourth Proportional to 15,528.43, 21,428.15 and 8,814.19

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Solution

The fourth proportional to 15,528.43, 21,428.15 and 8,814.19 is: 12,162.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,528.43 : 21,428.15 = 8,814.19 : x
  2. Step 2: Convert to fraction form
    15,528.43/21,428.15 = 8,814.19/x
  3. Step 3: Cross multiply
    15,528.43x = 21,428.15 × 8,814.19
  4. Step 4: Simplify right side
    15,528.43x = 188,871,785.45
  5. Step 5: Solve for x
    x = 188,871,785.45/15,528.43
  6. Step 6: Final answer
    x = 12,162.97

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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.