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Finding the Fourth Proportional to 10,888.61, 15,030.85 and 9,218.67

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Solution

The fourth proportional to 10,888.61, 15,030.85 and 9,218.67 is: 12,725.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,888.61 : 15,030.85 = 9,218.67 : x
  2. Step 2: Convert to fraction form
    10,888.61/15,030.85 = 9,218.67/x
  3. Step 3: Cross multiply
    10,888.61x = 15,030.85 × 9,218.67
  4. Step 4: Simplify right side
    10,888.61x = 138,564,401.13
  5. Step 5: Solve for x
    x = 138,564,401.13/10,888.61
  6. Step 6: Final answer
    x = 12,725.63

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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.