Home / 20,900.48-28,852.16-13,357.12

Finding the Fourth Proportional to 20,900.48, 28,852.16 and 13,357.12

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Solution

The fourth proportional to 20,900.48, 28,852.16 and 13,357.12 is: 18,438.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,900.48 : 28,852.16 = 13,357.12 : x
  2. Step 2: Convert to fraction form
    20,900.48/28,852.16 = 13,357.12/x
  3. Step 3: Cross multiply
    20,900.48x = 28,852.16 × 13,357.12
  4. Step 4: Simplify right side
    20,900.48x = 385,381,763.38
  5. Step 5: Solve for x
    x = 385,381,763.38/20,900.48
  6. Step 6: Final answer
    x = 18,438.90

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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.