Home / 20,686.32-28,560.60-13,624.74

Finding the Fourth Proportional to 20,686.32, 28,560.60 and 13,624.74

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Solution

The fourth proportional to 20,686.32, 28,560.60 and 13,624.74 is: 18,811.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,686.32 : 28,560.60 = 13,624.74 : x
  2. Step 2: Convert to fraction form
    20,686.32/28,560.60 = 13,624.74/x
  3. Step 3: Cross multiply
    20,686.32x = 28,560.60 × 13,624.74
  4. Step 4: Simplify right side
    20,686.32x = 389,130,749.24
  5. Step 5: Solve for x
    x = 389,130,749.24/20,686.32
  6. Step 6: Final answer
    x = 18,811.02

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.