Home / 21,908.30-32,870.55-7,117.70

Finding the Fourth Proportional to 21,908.30, 32,870.55 and 7,117.70

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Solution

The fourth proportional to 21,908.30, 32,870.55 and 7,117.70 is: 10,679.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,908.30 : 32,870.55 = 7,117.70 : x
  2. Step 2: Convert to fraction form
    21,908.30/32,870.55 = 7,117.70/x
  3. Step 3: Cross multiply
    21,908.30x = 32,870.55 × 7,117.70
  4. Step 4: Simplify right side
    21,908.30x = 233,962,713.74
  5. Step 5: Solve for x
    x = 233,962,713.74/21,908.30
  6. Step 6: Final answer
    x = 10,679.18

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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.