Home / 20,956.61-31,438.16-9,864.47

Finding the Fourth Proportional to 20,956.61, 31,438.16 and 9,864.47

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Solution

The fourth proportional to 20,956.61, 31,438.16 and 9,864.47 is: 14,798.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,956.61 : 31,438.16 = 9,864.47 : x
  2. Step 2: Convert to fraction form
    20,956.61/31,438.16 = 9,864.47/x
  3. Step 3: Cross multiply
    20,956.61x = 31,438.16 × 9,864.47
  4. Step 4: Simplify right side
    20,956.61x = 310,120,579.66
  5. Step 5: Solve for x
    x = 310,120,579.66/20,956.61
  6. Step 6: Final answer
    x = 14,798.23

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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.