Home / 43,479.60-65,219.40-12,315.12

Finding the Fourth Proportional to 43,479.60, 65,219.40 and 12,315.12

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Solution

The fourth proportional to 43,479.60, 65,219.40 and 12,315.12 is: 18,472.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,479.60 : 65,219.40 = 12,315.12 : x
  2. Step 2: Convert to fraction form
    43,479.60/65,219.40 = 12,315.12/x
  3. Step 3: Cross multiply
    43,479.60x = 65,219.40 × 12,315.12
  4. Step 4: Simplify right side
    43,479.60x = 803,184,737.33
  5. Step 5: Solve for x
    x = 803,184,737.33/43,479.60
  6. Step 6: Final answer
    x = 18,472.68

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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.