Home / 43,909.20-65,870.24-12,740.40

Finding the Fourth Proportional to 43,909.20, 65,870.24 and 12,740.40

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Solution

The fourth proportional to 43,909.20, 65,870.24 and 12,740.40 is: 19,112.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,909.20 : 65,870.24 = 12,740.40 : x
  2. Step 2: Convert to fraction form
    43,909.20/65,870.24 = 12,740.40/x
  3. Step 3: Cross multiply
    43,909.20x = 65,870.24 × 12,740.40
  4. Step 4: Simplify right side
    43,909.20x = 839,213,205.70
  5. Step 5: Solve for x
    x = 839,213,205.70/43,909.20
  6. Step 6: Final answer
    x = 19,112.47

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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.