Home / 23,138.76-31,931.78-13,705.50

Finding the Fourth Proportional to 23,138.76, 31,931.78 and 13,705.50

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Solution

The fourth proportional to 23,138.76, 31,931.78 and 13,705.50 is: 18,913.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    23,138.76 : 31,931.78 = 13,705.50 : x
  2. Step 2: Convert to fraction form
    23,138.76/31,931.78 = 13,705.50/x
  3. Step 3: Cross multiply
    23,138.76x = 31,931.78 × 13,705.50
  4. Step 4: Simplify right side
    23,138.76x = 437,641,010.79
  5. Step 5: Solve for x
    x = 437,641,010.79/23,138.76
  6. Step 6: Final answer
    x = 18,913.76

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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.