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Finding the Fourth Proportional to 8,390.48, 11,574.50 and 5,031.68

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Solution

The fourth proportional to 8,390.48, 11,574.50 and 5,031.68 is: 6,941.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,390.48 : 11,574.50 = 5,031.68 : x
  2. Step 2: Convert to fraction form
    8,390.48/11,574.50 = 5,031.68/x
  3. Step 3: Cross multiply
    8,390.48x = 11,574.50 × 5,031.68
  4. Step 4: Simplify right side
    8,390.48x = 58,239,180.16
  5. Step 5: Solve for x
    x = 58,239,180.16/8,390.48
  6. Step 6: Final answer
    x = 6,941.10

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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.