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Finding the Fourth Proportional to 8,723.64, 12,038.70 and 8,062.20

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Solution

The fourth proportional to 8,723.64, 12,038.70 and 8,062.20 is: 11,125.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,723.64 : 12,038.70 = 8,062.20 : x
  2. Step 2: Convert to fraction form
    8,723.64/12,038.70 = 8,062.20/x
  3. Step 3: Cross multiply
    8,723.64x = 12,038.70 × 8,062.20
  4. Step 4: Simplify right side
    8,723.64x = 97,058,407.14
  5. Step 5: Solve for x
    x = 97,058,407.14/8,723.64
  6. Step 6: Final answer
    x = 11,125.91

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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.