Home / 15,330.47-21,156.80-9,361.17

Finding the Fourth Proportional to 15,330.47, 21,156.80 and 9,361.17

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Solution

The fourth proportional to 15,330.47, 21,156.80 and 9,361.17 is: 12,918.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,330.47 : 21,156.80 = 9,361.17 : x
  2. Step 2: Convert to fraction form
    15,330.47/21,156.80 = 9,361.17/x
  3. Step 3: Cross multiply
    15,330.47x = 21,156.80 × 9,361.17
  4. Step 4: Simplify right side
    15,330.47x = 198,052,354.65
  5. Step 5: Solve for x
    x = 198,052,354.65/15,330.47
  6. Step 6: Final answer
    x = 12,918.87

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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.