Home / 15,890.40-23,835.60-12,211.20

Finding the Fourth Proportional to 15,890.40, 23,835.60 and 12,211.20

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Solution

The fourth proportional to 15,890.40, 23,835.60 and 12,211.20 is: 18,316.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,890.40 : 23,835.60 = 12,211.20 : x
  2. Step 2: Convert to fraction form
    15,890.40/23,835.60 = 12,211.20/x
  3. Step 3: Cross multiply
    15,890.40x = 23,835.60 × 12,211.20
  4. Step 4: Simplify right side
    15,890.40x = 291,061,278.72
  5. Step 5: Solve for x
    x = 291,061,278.72/15,890.40
  6. Step 6: Final answer
    x = 18,316.80

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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.