Home / 20,580.07-28,400.70-11,148.84

Finding the Fourth Proportional to 20,580.07, 28,400.70 and 11,148.84

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Solution

The fourth proportional to 20,580.07, 28,400.70 and 11,148.84 is: 15,385.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,580.07 : 28,400.70 = 11,148.84 : x
  2. Step 2: Convert to fraction form
    20,580.07/28,400.70 = 11,148.84/x
  3. Step 3: Cross multiply
    20,580.07x = 28,400.70 × 11,148.84
  4. Step 4: Simplify right side
    20,580.07x = 316,634,860.19
  5. Step 5: Solve for x
    x = 316,634,860.19/20,580.07
  6. Step 6: Final answer
    x = 15,385.51

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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.