Home / 21,270.65-31,861.78-17,972.15

Finding the Fourth Proportional to 21,270.65, 31,861.78 and 17,972.15

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Solution

The fourth proportional to 21,270.65, 31,861.78 and 17,972.15 is: 26,920.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,270.65 : 31,861.78 = 17,972.15 : x
  2. Step 2: Convert to fraction form
    21,270.65/31,861.78 = 17,972.15/x
  3. Step 3: Cross multiply
    21,270.65x = 31,861.78 × 17,972.15
  4. Step 4: Simplify right side
    21,270.65x = 572,624,599.57
  5. Step 5: Solve for x
    x = 572,624,599.57/21,270.65
  6. Step 6: Final answer
    x = 26,920.88

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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.