Home / 13,143.75-19,708.05-8,988.80

Finding the Fourth Proportional to 13,143.75, 19,708.05 and 8,988.80

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Solution

The fourth proportional to 13,143.75, 19,708.05 and 8,988.80 is: 13,478.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,143.75 : 19,708.05 = 8,988.80 : x
  2. Step 2: Convert to fraction form
    13,143.75/19,708.05 = 8,988.80/x
  3. Step 3: Cross multiply
    13,143.75x = 19,708.05 × 8,988.80
  4. Step 4: Simplify right side
    13,143.75x = 177,151,693.04
  5. Step 5: Solve for x
    x = 177,151,693.04/13,143.75
  6. Step 6: Final answer
    x = 13,478.01

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.