Home / 15,515.81-21,411.78-8,442.19

Finding the Fourth Proportional to 15,515.81, 21,411.78 and 8,442.19

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Solution

The fourth proportional to 15,515.81, 21,411.78 and 8,442.19 is: 11,650.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,515.81 : 21,411.78 = 8,442.19 : x
  2. Step 2: Convert to fraction form
    15,515.81/21,411.78 = 8,442.19/x
  3. Step 3: Cross multiply
    15,515.81x = 21,411.78 × 8,442.19
  4. Step 4: Simplify right side
    15,515.81x = 180,762,207.94
  5. Step 5: Solve for x
    x = 180,762,207.94/15,515.81
  6. Step 6: Final answer
    x = 11,650.20

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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.