Home / 13,750.10-20,630.55-5,428.70

Finding the Fourth Proportional to 13,750.10, 20,630.55 and 5,428.70

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Solution

The fourth proportional to 13,750.10, 20,630.55 and 5,428.70 is: 8,145.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,750.10 : 20,630.55 = 5,428.70 : x
  2. Step 2: Convert to fraction form
    13,750.10/20,630.55 = 5,428.70/x
  3. Step 3: Cross multiply
    13,750.10x = 20,630.55 × 5,428.70
  4. Step 4: Simplify right side
    13,750.10x = 111,997,066.79
  5. Step 5: Solve for x
    x = 111,997,066.79/13,750.10
  6. Step 6: Final answer
    x = 8,145.18

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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.