Home / 20,580.09-28,400.51-11,148.65

Finding the Fourth Proportional to 20,580.09, 28,400.51 and 11,148.65

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Solution

The fourth proportional to 20,580.09, 28,400.51 and 11,148.65 is: 15,385.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,580.09 : 28,400.51 = 11,148.65 : x
  2. Step 2: Convert to fraction form
    20,580.09/28,400.51 = 11,148.65/x
  3. Step 3: Cross multiply
    20,580.09x = 28,400.51 × 11,148.65
  4. Step 4: Simplify right side
    20,580.09x = 316,627,345.81
  5. Step 5: Solve for x
    x = 316,627,345.81/20,580.09
  6. Step 6: Final answer
    x = 15,385.13

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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.