Home / 10,892.29-15,031.35-7,121.76

Finding the Fourth Proportional to 10,892.29, 15,031.35 and 7,121.76

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Solution

The fourth proportional to 10,892.29, 15,031.35 and 7,121.76 is: 9,828.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,892.29 : 15,031.35 = 7,121.76 : x
  2. Step 2: Convert to fraction form
    10,892.29/15,031.35 = 7,121.76/x
  3. Step 3: Cross multiply
    10,892.29x = 15,031.35 × 7,121.76
  4. Step 4: Simplify right side
    10,892.29x = 107,049,699.26
  5. Step 5: Solve for x
    x = 107,049,699.26/10,892.29
  6. Step 6: Final answer
    x = 9,828.03

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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.