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Finding the Fourth Proportional to 19,141.68, 28,726.56 and 12,565.56

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Solution

The fourth proportional to 19,141.68, 28,726.56 and 12,565.56 is: 18,857.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,141.68 : 28,726.56 = 12,565.56 : x
  2. Step 2: Convert to fraction form
    19,141.68/28,726.56 = 12,565.56/x
  3. Step 3: Cross multiply
    19,141.68x = 28,726.56 × 12,565.56
  4. Step 4: Simplify right side
    19,141.68x = 360,965,313.27
  5. Step 5: Solve for x
    x = 360,965,313.27/19,141.68
  6. Step 6: Final answer
    x = 18,857.56

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.