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Finding the Fourth Proportional to 8,003.40, 12,005.10 and 7,031.40

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Solution

The fourth proportional to 8,003.40, 12,005.10 and 7,031.40 is: 10,547.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,003.40 : 12,005.10 = 7,031.40 : x
  2. Step 2: Convert to fraction form
    8,003.40/12,005.10 = 7,031.40/x
  3. Step 3: Cross multiply
    8,003.40x = 12,005.10 × 7,031.40
  4. Step 4: Simplify right side
    8,003.40x = 84,412,660.14
  5. Step 5: Solve for x
    x = 84,412,660.14/8,003.40
  6. Step 6: Final answer
    x = 10,547.10

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.