Home / 20,390.32-28,147.47-19,113.61

Finding the Fourth Proportional to 20,390.32, 28,147.47 and 19,113.61

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Solution

The fourth proportional to 20,390.32, 28,147.47 and 19,113.61 is: 26,385.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,390.32 : 28,147.47 = 19,113.61 : x
  2. Step 2: Convert to fraction form
    20,390.32/28,147.47 = 19,113.61/x
  3. Step 3: Cross multiply
    20,390.32x = 28,147.47 × 19,113.61
  4. Step 4: Simplify right side
    20,390.32x = 537,999,764.07
  5. Step 5: Solve for x
    x = 537,999,764.07/20,390.32
  6. Step 6: Final answer
    x = 26,385.06

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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.