Home / 31,405.20-47,107.80-12,937.20

Finding the Fourth Proportional to 31,405.20, 47,107.80 and 12,937.20

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Solution

The fourth proportional to 31,405.20, 47,107.80 and 12,937.20 is: 19,405.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,405.20 : 47,107.80 = 12,937.20 : x
  2. Step 2: Convert to fraction form
    31,405.20/47,107.80 = 12,937.20/x
  3. Step 3: Cross multiply
    31,405.20x = 47,107.80 × 12,937.20
  4. Step 4: Simplify right side
    31,405.20x = 609,443,030.16
  5. Step 5: Solve for x
    x = 609,443,030.16/31,405.20
  6. Step 6: Final answer
    x = 19,405.80

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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.