Home / 42,938.61-64,418.90-13,356.70

Finding the Fourth Proportional to 42,938.61, 64,418.90 and 13,356.70

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Solution

The fourth proportional to 42,938.61, 64,418.90 and 13,356.70 is: 20,038.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,938.61 : 64,418.90 = 13,356.70 : x
  2. Step 2: Convert to fraction form
    42,938.61/64,418.90 = 13,356.70/x
  3. Step 3: Cross multiply
    42,938.61x = 64,418.90 × 13,356.70
  4. Step 4: Simplify right side
    42,938.61x = 860,423,921.63
  5. Step 5: Solve for x
    x = 860,423,921.63/42,938.61
  6. Step 6: Final answer
    x = 20,038.47

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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.