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Finding the Fourth Proportional to 15,666.81, 21,648.81 and 11,410.47

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Solution

The fourth proportional to 15,666.81, 21,648.81 and 11,410.47 is: 15,767.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,666.81 : 21,648.81 = 11,410.47 : x
  2. Step 2: Convert to fraction form
    15,666.81/21,648.81 = 11,410.47/x
  3. Step 3: Cross multiply
    15,666.81x = 21,648.81 × 11,410.47
  4. Step 4: Simplify right side
    15,666.81x = 247,023,097.04
  5. Step 5: Solve for x
    x = 247,023,097.04/15,666.81
  6. Step 6: Final answer
    x = 15,767.29

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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.