Home / 15,471.51-21,350.28-8,397.78

Finding the Fourth Proportional to 15,471.51, 21,350.28 and 8,397.78

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Solution

The fourth proportional to 15,471.51, 21,350.28 and 8,397.78 is: 11,588.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,471.51 : 21,350.28 = 8,397.78 : x
  2. Step 2: Convert to fraction form
    15,471.51/21,350.28 = 8,397.78/x
  3. Step 3: Cross multiply
    15,471.51x = 21,350.28 × 8,397.78
  4. Step 4: Simplify right side
    15,471.51x = 179,294,905.81
  5. Step 5: Solve for x
    x = 179,294,905.81/15,471.51
  6. Step 6: Final answer
    x = 11,588.72

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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.