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Finding the Fourth Proportional to 15,521.24, 21,420.06 and 8,807.24

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Solution

The fourth proportional to 15,521.24, 21,420.06 and 8,807.24 is: 12,154.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,521.24 : 21,420.06 = 8,807.24 : x
  2. Step 2: Convert to fraction form
    15,521.24/21,420.06 = 8,807.24/x
  3. Step 3: Cross multiply
    15,521.24x = 21,420.06 × 8,807.24
  4. Step 4: Simplify right side
    15,521.24x = 188,651,609.23
  5. Step 5: Solve for x
    x = 188,651,609.23/15,521.24
  6. Step 6: Final answer
    x = 12,154.42

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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.