Home / 31,530.40-47,257.20-13,981.60

Finding the Fourth Proportional to 31,530.40, 47,257.20 and 13,981.60

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Solution

The fourth proportional to 31,530.40, 47,257.20 and 13,981.60 is: 20,955.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,530.40 : 47,257.20 = 13,981.60 : x
  2. Step 2: Convert to fraction form
    31,530.40/47,257.20 = 13,981.60/x
  3. Step 3: Cross multiply
    31,530.40x = 47,257.20 × 13,981.60
  4. Step 4: Simplify right side
    31,530.40x = 660,731,267.52
  5. Step 5: Solve for x
    x = 660,731,267.52/31,530.40
  6. Step 6: Final answer
    x = 20,955.37

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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.