Home / 15,365.48-21,207.68-9,078.80

Finding the Fourth Proportional to 15,365.48, 21,207.68 and 9,078.80

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Solution

The fourth proportional to 15,365.48, 21,207.68 and 9,078.80 is: 12,530.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,365.48 : 21,207.68 = 9,078.80 : x
  2. Step 2: Convert to fraction form
    15,365.48/21,207.68 = 9,078.80/x
  3. Step 3: Cross multiply
    15,365.48x = 21,207.68 × 9,078.80
  4. Step 4: Simplify right side
    15,365.48x = 192,540,285.18
  5. Step 5: Solve for x
    x = 192,540,285.18/15,365.48
  6. Step 6: Final answer
    x = 12,530.70

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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.