Home / 20,891.74-31,332.70-12,460.60

Finding the Fourth Proportional to 20,891.74, 31,332.70 and 12,460.60

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Solution

The fourth proportional to 20,891.74, 31,332.70 and 12,460.60 is: 18,687.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,891.74 : 31,332.70 = 12,460.60 : x
  2. Step 2: Convert to fraction form
    20,891.74/31,332.70 = 12,460.60/x
  3. Step 3: Cross multiply
    20,891.74x = 31,332.70 × 12,460.60
  4. Step 4: Simplify right side
    20,891.74x = 390,424,406.26
  5. Step 5: Solve for x
    x = 390,424,406.26/20,891.74
  6. Step 6: Final answer
    x = 18,687.98

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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.