Home / 13,721.60-18,934.40-7,752.80

Finding the Fourth Proportional to 13,721.60, 18,934.40 and 7,752.80

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Solution

The fourth proportional to 13,721.60, 18,934.40 and 7,752.80 is: 10,698.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,721.60 : 18,934.40 = 7,752.80 : x
  2. Step 2: Convert to fraction form
    13,721.60/18,934.40 = 7,752.80/x
  3. Step 3: Cross multiply
    13,721.60x = 18,934.40 × 7,752.80
  4. Step 4: Simplify right side
    13,721.60x = 146,794,616.32
  5. Step 5: Solve for x
    x = 146,794,616.32/13,721.60
  6. Step 6: Final answer
    x = 10,698.07

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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.