Home / 20,580.39-28,400.76-11,148.93

Finding the Fourth Proportional to 20,580.39, 28,400.76 and 11,148.93

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Solution

The fourth proportional to 20,580.39, 28,400.76 and 11,148.93 is: 15,385.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,580.39 : 28,400.76 = 11,148.93 : x
  2. Step 2: Convert to fraction form
    20,580.39/28,400.76 = 11,148.93/x
  3. Step 3: Cross multiply
    20,580.39x = 28,400.76 × 11,148.93
  4. Step 4: Simplify right side
    20,580.39x = 316,638,085.19
  5. Step 5: Solve for x
    x = 316,638,085.19/20,580.39
  6. Step 6: Final answer
    x = 15,385.43

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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.