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Finding the Fourth Proportional to 8,708.58, 12,018.10 and 4,931.68

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Solution

The fourth proportional to 8,708.58, 12,018.10 and 4,931.68 is: 6,805.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,708.58 : 12,018.10 = 4,931.68 : x
  2. Step 2: Convert to fraction form
    8,708.58/12,018.10 = 4,931.68/x
  3. Step 3: Cross multiply
    8,708.58x = 12,018.10 × 4,931.68
  4. Step 4: Simplify right side
    8,708.58x = 59,269,423.41
  5. Step 5: Solve for x
    x = 59,269,423.41/8,708.58
  6. Step 6: Final answer
    x = 6,805.87

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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.