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Finding the Fourth Proportional to 15,369.41, 21,209.57 and 8,655.11

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Solution

The fourth proportional to 15,369.41, 21,209.57 and 8,655.11 is: 11,943.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,369.41 : 21,209.57 = 8,655.11 : x
  2. Step 2: Convert to fraction form
    15,369.41/21,209.57 = 8,655.11/x
  3. Step 3: Cross multiply
    15,369.41x = 21,209.57 × 8,655.11
  4. Step 4: Simplify right side
    15,369.41x = 183,571,118.13
  5. Step 5: Solve for x
    x = 183,571,118.13/15,369.41
  6. Step 6: Final answer
    x = 11,943.93

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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.