Home / 15,320.74-21,142.05-8,515.18

Finding the Fourth Proportional to 15,320.74, 21,142.05 and 8,515.18

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Solution

The fourth proportional to 15,320.74, 21,142.05 and 8,515.18 is: 11,750.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,320.74 : 21,142.05 = 8,515.18 : x
  2. Step 2: Convert to fraction form
    15,320.74/21,142.05 = 8,515.18/x
  3. Step 3: Cross multiply
    15,320.74x = 21,142.05 × 8,515.18
  4. Step 4: Simplify right side
    15,320.74x = 180,028,213.03
  5. Step 5: Solve for x
    x = 180,028,213.03/15,320.74
  6. Step 6: Final answer
    x = 11,750.63

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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.