Home / 12,721.60-19,089.60-8,828.80

Finding the Fourth Proportional to 12,721.60, 19,089.60 and 8,828.80

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Solution

The fourth proportional to 12,721.60, 19,089.60 and 8,828.80 is: 13,248.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,721.60 : 19,089.60 = 8,828.80 : x
  2. Step 2: Convert to fraction form
    12,721.60/19,089.60 = 8,828.80/x
  3. Step 3: Cross multiply
    12,721.60x = 19,089.60 × 8,828.80
  4. Step 4: Simplify right side
    12,721.60x = 168,538,260.48
  5. Step 5: Solve for x
    x = 168,538,260.48/12,721.60
  6. Step 6: Final answer
    x = 13,248.20

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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.