Home / 20,581.20-28,400.04-12,196.08

Finding the Fourth Proportional to 20,581.20, 28,400.04 and 12,196.08

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Solution

The fourth proportional to 20,581.20, 28,400.04 and 12,196.08 is: 16,829.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,581.20 : 28,400.04 = 12,196.08 : x
  2. Step 2: Convert to fraction form
    20,581.20/28,400.04 = 12,196.08/x
  3. Step 3: Cross multiply
    20,581.20x = 28,400.04 × 12,196.08
  4. Step 4: Simplify right side
    20,581.20x = 346,369,159.84
  5. Step 5: Solve for x
    x = 346,369,159.84/20,581.20
  6. Step 6: Final answer
    x = 16,829.40

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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.