Home / 20,876.84-28,810.74-11,445.32

Finding the Fourth Proportional to 20,876.84, 28,810.74 and 11,445.32

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Solution

The fourth proportional to 20,876.84, 28,810.74 and 11,445.32 is: 15,794.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,876.84 : 28,810.74 = 11,445.32 : x
  2. Step 2: Convert to fraction form
    20,876.84/28,810.74 = 11,445.32/x
  3. Step 3: Cross multiply
    20,876.84x = 28,810.74 × 11,445.32
  4. Step 4: Simplify right side
    20,876.84x = 329,748,138.74
  5. Step 5: Solve for x
    x = 329,748,138.74/20,876.84
  6. Step 6: Final answer
    x = 15,794.93

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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.