Home / 40,830.78-61,253.42-18,646.40

Finding the Fourth Proportional to 40,830.78, 61,253.42 and 18,646.40

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Solution

The fourth proportional to 40,830.78, 61,253.42 and 18,646.40 is: 27,972.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,830.78 : 61,253.42 = 18,646.40 : x
  2. Step 2: Convert to fraction form
    40,830.78/61,253.42 = 18,646.40/x
  3. Step 3: Cross multiply
    40,830.78x = 61,253.42 × 18,646.40
  4. Step 4: Simplify right side
    40,830.78x = 1,142,155,830.59
  5. Step 5: Solve for x
    x = 1,142,155,830.59/40,830.78
  6. Step 6: Final answer
    x = 27,972.91

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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.