Home / 20,607.68-28,438.68-11,176.40

Finding the Fourth Proportional to 20,607.68, 28,438.68 and 11,176.40

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Solution

The fourth proportional to 20,607.68, 28,438.68 and 11,176.40 is: 15,423.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,607.68 : 28,438.68 = 11,176.40 : x
  2. Step 2: Convert to fraction form
    20,607.68/28,438.68 = 11,176.40/x
  3. Step 3: Cross multiply
    20,607.68x = 28,438.68 × 11,176.40
  4. Step 4: Simplify right side
    20,607.68x = 317,842,063.15
  5. Step 5: Solve for x
    x = 317,842,063.15/20,607.68
  6. Step 6: Final answer
    x = 15,423.48

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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.