Home / 13,586.40-20,347.20-8,337.60

Finding the Fourth Proportional to 13,586.40, 20,347.20 and 8,337.60

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Solution

The fourth proportional to 13,586.40, 20,347.20 and 8,337.60 is: 12,486.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,586.40 : 20,347.20 = 8,337.60 : x
  2. Step 2: Convert to fraction form
    13,586.40/20,347.20 = 8,337.60/x
  3. Step 3: Cross multiply
    13,586.40x = 20,347.20 × 8,337.60
  4. Step 4: Simplify right side
    13,586.40x = 169,646,814.72
  5. Step 5: Solve for x
    x = 169,646,814.72/13,586.40
  6. Step 6: Final answer
    x = 12,486.52

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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.