Home / 13,920.40-19,210.20-7,632.80

Finding the Fourth Proportional to 13,920.40, 19,210.20 and 7,632.80

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Solution

The fourth proportional to 13,920.40, 19,210.20 and 7,632.80 is: 10,533.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,920.40 : 19,210.20 = 7,632.80 : x
  2. Step 2: Convert to fraction form
    13,920.40/19,210.20 = 7,632.80/x
  3. Step 3: Cross multiply
    13,920.40x = 19,210.20 × 7,632.80
  4. Step 4: Simplify right side
    13,920.40x = 146,627,614.56
  5. Step 5: Solve for x
    x = 146,627,614.56/13,920.40
  6. Step 6: Final answer
    x = 10,533.29

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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.