Home / 20,130.60-30,176.70-15,685.80

Finding the Fourth Proportional to 20,130.60, 30,176.70 and 15,685.80

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Solution

The fourth proportional to 20,130.60, 30,176.70 and 15,685.80 is: 23,513.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,130.60 : 30,176.70 = 15,685.80 : x
  2. Step 2: Convert to fraction form
    20,130.60/30,176.70 = 15,685.80/x
  3. Step 3: Cross multiply
    20,130.60x = 30,176.70 × 15,685.80
  4. Step 4: Simplify right side
    20,130.60x = 473,345,680.86
  5. Step 5: Solve for x
    x = 473,345,680.86/20,130.60
  6. Step 6: Final answer
    x = 23,513.74

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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.