Home / 31,417.20-47,125.80-12,949.20

Finding the Fourth Proportional to 31,417.20, 47,125.80 and 12,949.20

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Solution

The fourth proportional to 31,417.20, 47,125.80 and 12,949.20 is: 19,423.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,417.20 : 47,125.80 = 12,949.20 : x
  2. Step 2: Convert to fraction form
    31,417.20/47,125.80 = 12,949.20/x
  3. Step 3: Cross multiply
    31,417.20x = 47,125.80 × 12,949.20
  4. Step 4: Simplify right side
    31,417.20x = 610,241,409.36
  5. Step 5: Solve for x
    x = 610,241,409.36/31,417.20
  6. Step 6: Final answer
    x = 19,423.80

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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.