Home / 8,445.15-12,671.28-5,158.35

Finding the Fourth Proportional to 8,445.15, 12,671.28 and 5,158.35

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Solution

The fourth proportional to 8,445.15, 12,671.28 and 5,158.35 is: 7,739.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,445.15 : 12,671.28 = 5,158.35 : x
  2. Step 2: Convert to fraction form
    8,445.15/12,671.28 = 5,158.35/x
  3. Step 3: Cross multiply
    8,445.15x = 12,671.28 × 5,158.35
  4. Step 4: Simplify right side
    8,445.15x = 65,362,897.19
  5. Step 5: Solve for x
    x = 65,362,897.19/8,445.15
  6. Step 6: Final answer
    x = 7,739.70

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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.