Home / 15,120.68-20,858.55-8,984.89

Finding the Fourth Proportional to 15,120.68, 20,858.55 and 8,984.89

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Solution

The fourth proportional to 15,120.68, 20,858.55 and 8,984.89 is: 12,394.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,120.68 : 20,858.55 = 8,984.89 : x
  2. Step 2: Convert to fraction form
    15,120.68/20,858.55 = 8,984.89/x
  3. Step 3: Cross multiply
    15,120.68x = 20,858.55 × 8,984.89
  4. Step 4: Simplify right side
    15,120.68x = 187,411,769.69
  5. Step 5: Solve for x
    x = 187,411,769.69/15,120.68
  6. Step 6: Final answer
    x = 12,394.40

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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.