Home / 31,581.78-47,374.70-12,851.60

Finding the Fourth Proportional to 31,581.78, 47,374.70 and 12,851.60

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Solution

The fourth proportional to 31,581.78, 47,374.70 and 12,851.60 is: 19,278.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,581.78 : 47,374.70 = 12,851.60 : x
  2. Step 2: Convert to fraction form
    31,581.78/47,374.70 = 12,851.60/x
  3. Step 3: Cross multiply
    31,581.78x = 47,374.70 × 12,851.60
  4. Step 4: Simplify right side
    31,581.78x = 608,840,393.39
  5. Step 5: Solve for x
    x = 608,840,393.39/31,581.78
  6. Step 6: Final answer
    x = 19,278.22

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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.