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Finding the Fourth Proportional to 10,885.47, 15,021.95 and 6,636.53

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Solution

The fourth proportional to 10,885.47, 15,021.95 and 6,636.53 is: 9,158.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,885.47 : 15,021.95 = 6,636.53 : x
  2. Step 2: Convert to fraction form
    10,885.47/15,021.95 = 6,636.53/x
  3. Step 3: Cross multiply
    10,885.47x = 15,021.95 × 6,636.53
  4. Step 4: Simplify right side
    10,885.47x = 99,693,513.54
  5. Step 5: Solve for x
    x = 99,693,513.54/10,885.47
  6. Step 6: Final answer
    x = 9,158.40

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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.