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Finding the Fourth Proportional to 10,870.91, 15,001.91 and 6,156.11

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Solution

The fourth proportional to 10,870.91, 15,001.91 and 6,156.11 is: 8,495.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,870.91 : 15,001.91 = 6,156.11 : x
  2. Step 2: Convert to fraction form
    10,870.91/15,001.91 = 6,156.11/x
  3. Step 3: Cross multiply
    10,870.91x = 15,001.91 × 6,156.11
  4. Step 4: Simplify right side
    10,870.91x = 92,353,302.38
  5. Step 5: Solve for x
    x = 92,353,302.38/10,870.91
  6. Step 6: Final answer
    x = 8,495.46

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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.