Home / 20,403.76-28,156.56-11,451.04

Finding the Fourth Proportional to 20,403.76, 28,156.56 and 11,451.04

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Solution

The fourth proportional to 20,403.76, 28,156.56 and 11,451.04 is: 15,802.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,403.76 : 28,156.56 = 11,451.04 : x
  2. Step 2: Convert to fraction form
    20,403.76/28,156.56 = 11,451.04/x
  3. Step 3: Cross multiply
    20,403.76x = 28,156.56 × 11,451.04
  4. Step 4: Simplify right side
    20,403.76x = 322,421,894.82
  5. Step 5: Solve for x
    x = 322,421,894.82/20,403.76
  6. Step 6: Final answer
    x = 15,802.08

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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.