Home / 21,275.40-31,913.10-21,244.65

Finding the Fourth Proportional to 21,275.40, 31,913.10 and 21,244.65

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Solution

The fourth proportional to 21,275.40, 31,913.10 and 21,244.65 is: 31,866.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,275.40 : 31,913.10 = 21,244.65 : x
  2. Step 2: Convert to fraction form
    21,275.40/31,913.10 = 21,244.65/x
  3. Step 3: Cross multiply
    21,275.40x = 31,913.10 × 21,244.65
  4. Step 4: Simplify right side
    21,275.40x = 677,982,639.92
  5. Step 5: Solve for x
    x = 677,982,639.92/21,275.40
  6. Step 6: Final answer
    x = 31,866.98

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Similar ratio
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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.