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Finding the Fourth Proportional to 55,557.64, 83,345.12 and 18,613

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Solution

The fourth proportional to 55,557.64, 83,345.12 and 18,613 is: 27,922.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,557.64 : 83,345.12 = 18,613 : x
  2. Step 2: Convert to fraction form
    55,557.64/83,345.12 = 18,613/x
  3. Step 3: Cross multiply
    55,557.64x = 83,345.12 × 18,613
  4. Step 4: Simplify right side
    55,557.64x = 1,551,302,718.56
  5. Step 5: Solve for x
    x = 1,551,302,718.56/55,557.64
  6. Step 6: Final answer
    x = 27,922.40

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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.