Home / 21,202.38-31,803.56-12,432.51

Finding the Fourth Proportional to 21,202.38, 31,803.56 and 12,432.51

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Solution

The fourth proportional to 21,202.38, 31,803.56 and 12,432.51 is: 18,648.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,202.38 : 31,803.56 = 12,432.51 : x
  2. Step 2: Convert to fraction form
    21,202.38/31,803.56 = 12,432.51/x
  3. Step 3: Cross multiply
    21,202.38x = 31,803.56 × 12,432.51
  4. Step 4: Simplify right side
    21,202.38x = 395,398,077.74
  5. Step 5: Solve for x
    x = 395,398,077.74/21,202.38
  6. Step 6: Final answer
    x = 18,648.76

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1.5x scale

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.