Home / 21,918.79-30,248.04-12,487.42

Finding the Fourth Proportional to 21,918.79, 30,248.04 and 12,487.42

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Solution

The fourth proportional to 21,918.79, 30,248.04 and 12,487.42 is: 17,232.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,918.79 : 30,248.04 = 12,487.42 : x
  2. Step 2: Convert to fraction form
    21,918.79/30,248.04 = 12,487.42/x
  3. Step 3: Cross multiply
    21,918.79x = 30,248.04 × 12,487.42
  4. Step 4: Simplify right side
    21,918.79x = 377,719,979.66
  5. Step 5: Solve for x
    x = 377,719,979.66/21,918.79
  6. Step 6: Final answer
    x = 17,232.70

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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.