Home / 15,522.11-21,419.88-8,807.60

Finding the Fourth Proportional to 15,522.11, 21,419.88 and 8,807.60

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Solution

The fourth proportional to 15,522.11, 21,419.88 and 8,807.60 is: 12,154.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,522.11 : 21,419.88 = 8,807.60 : x
  2. Step 2: Convert to fraction form
    15,522.11/21,419.88 = 8,807.60/x
  3. Step 3: Cross multiply
    15,522.11x = 21,419.88 × 8,807.60
  4. Step 4: Simplify right side
    15,522.11x = 188,657,583.95
  5. Step 5: Solve for x
    x = 188,657,583.95/15,522.11
  6. Step 6: Final answer
    x = 12,154.12

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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.