Home / 20,818.32-28,729.35-13,263.03

Finding the Fourth Proportional to 20,818.32, 28,729.35 and 13,263.03

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Solution

The fourth proportional to 20,818.32, 28,729.35 and 13,263.03 is: 18,303.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,818.32 : 28,729.35 = 13,263.03 : x
  2. Step 2: Convert to fraction form
    20,818.32/28,729.35 = 13,263.03/x
  3. Step 3: Cross multiply
    20,818.32x = 28,729.35 × 13,263.03
  4. Step 4: Simplify right side
    20,818.32x = 381,038,230.93
  5. Step 5: Solve for x
    x = 381,038,230.93/20,818.32
  6. Step 6: Final answer
    x = 18,303.02

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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.