Home / 13,270.48-18,315.24-7,680.40

Finding the Fourth Proportional to 13,270.48, 18,315.24 and 7,680.40

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Solution

The fourth proportional to 13,270.48, 18,315.24 and 7,680.40 is: 10,600.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,270.48 : 18,315.24 = 7,680.40 : x
  2. Step 2: Convert to fraction form
    13,270.48/18,315.24 = 7,680.40/x
  3. Step 3: Cross multiply
    13,270.48x = 18,315.24 × 7,680.40
  4. Step 4: Simplify right side
    13,270.48x = 140,668,369.30
  5. Step 5: Solve for x
    x = 140,668,369.30/13,270.48
  6. Step 6: Final answer
    x = 10,600.10

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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.