Home / 43,439.12-65,158.68-12,275.20

Finding the Fourth Proportional to 43,439.12, 65,158.68 and 12,275.20

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Solution

The fourth proportional to 43,439.12, 65,158.68 and 12,275.20 is: 18,412.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,439.12 : 65,158.68 = 12,275.20 : x
  2. Step 2: Convert to fraction form
    43,439.12/65,158.68 = 12,275.20/x
  3. Step 3: Cross multiply
    43,439.12x = 65,158.68 × 12,275.20
  4. Step 4: Simplify right side
    43,439.12x = 799,835,828.74
  5. Step 5: Solve for x
    x = 799,835,828.74/43,439.12
  6. Step 6: Final answer
    x = 18,412.80

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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.