Home / 20,707.20-31,043.43-9,011.70

Finding the Fourth Proportional to 20,707.20, 31,043.43 and 9,011.70

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Solution

The fourth proportional to 20,707.20, 31,043.43 and 9,011.70 is: 13,509.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,707.20 : 31,043.43 = 9,011.70 : x
  2. Step 2: Convert to fraction form
    20,707.20/31,043.43 = 9,011.70/x
  3. Step 3: Cross multiply
    20,707.20x = 31,043.43 × 9,011.70
  4. Step 4: Simplify right side
    20,707.20x = 279,754,078.13
  5. Step 5: Solve for x
    x = 279,754,078.13/20,707.20
  6. Step 6: Final answer
    x = 13,509.99

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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.