Home / 15,576.04-21,489.06-9,990.28

Finding the Fourth Proportional to 15,576.04, 21,489.06 and 9,990.28

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Solution

The fourth proportional to 15,576.04, 21,489.06 and 9,990.28 is: 13,782.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,576.04 : 21,489.06 = 9,990.28 : x
  2. Step 2: Convert to fraction form
    15,576.04/21,489.06 = 9,990.28/x
  3. Step 3: Cross multiply
    15,576.04x = 21,489.06 × 9,990.28
  4. Step 4: Simplify right side
    15,576.04x = 214,681,726.34
  5. Step 5: Solve for x
    x = 214,681,726.34/15,576.04
  6. Step 6: Final answer
    x = 13,782.82

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.