Home / 21,088.80-31,648.76-9,995.44

Finding the Fourth Proportional to 21,088.80, 31,648.76 and 9,995.44

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Solution

The fourth proportional to 21,088.80, 31,648.76 and 9,995.44 is: 15,000.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,088.80 : 31,648.76 = 9,995.44 : x
  2. Step 2: Convert to fraction form
    21,088.80/31,648.76 = 9,995.44/x
  3. Step 3: Cross multiply
    21,088.80x = 31,648.76 × 9,995.44
  4. Step 4: Simplify right side
    21,088.80x = 316,343,281.65
  5. Step 5: Solve for x
    x = 316,343,281.65/21,088.80
  6. Step 6: Final answer
    x = 15,000.53

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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.