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Finding the Fourth Proportional to 13,071.16, 18,030.90 and 8,031.88

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Solution

The fourth proportional to 13,071.16, 18,030.90 and 8,031.88 is: 11,079.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,071.16 : 18,030.90 = 8,031.88 : x
  2. Step 2: Convert to fraction form
    13,071.16/18,030.90 = 8,031.88/x
  3. Step 3: Cross multiply
    13,071.16x = 18,030.90 × 8,031.88
  4. Step 4: Simplify right side
    13,071.16x = 144,822,025.09
  5. Step 5: Solve for x
    x = 144,822,025.09/13,071.16
  6. Step 6: Final answer
    x = 11,079.51

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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.