Home / 15,476.40-21,343.68-12,491.28

Finding the Fourth Proportional to 15,476.40, 21,343.68 and 12,491.28

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Solution

The fourth proportional to 15,476.40, 21,343.68 and 12,491.28 is: 17,226.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,476.40 : 21,343.68 = 12,491.28 : x
  2. Step 2: Convert to fraction form
    15,476.40/21,343.68 = 12,491.28/x
  3. Step 3: Cross multiply
    15,476.40x = 21,343.68 × 12,491.28
  4. Step 4: Simplify right side
    15,476.40x = 266,609,883.11
  5. Step 5: Solve for x
    x = 266,609,883.11/15,476.40
  6. Step 6: Final answer
    x = 17,226.87

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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.