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Finding the Fourth Proportional to 15,808.68, 21,816.44 and 9,439

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Solution

The fourth proportional to 15,808.68, 21,816.44 and 9,439 is: 13,026.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,808.68 : 21,816.44 = 9,439 : x
  2. Step 2: Convert to fraction form
    15,808.68/21,816.44 = 9,439/x
  3. Step 3: Cross multiply
    15,808.68x = 21,816.44 × 9,439
  4. Step 4: Simplify right side
    15,808.68x = 205,925,377.16
  5. Step 5: Solve for x
    x = 205,925,377.16/15,808.68
  6. Step 6: Final answer
    x = 13,026.10

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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.