Home / 20,707.98-28,577.19-11,276.55

Finding the Fourth Proportional to 20,707.98, 28,577.19 and 11,276.55

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Solution

The fourth proportional to 20,707.98, 28,577.19 and 11,276.55 is: 15,561.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,707.98 : 28,577.19 = 11,276.55 : x
  2. Step 2: Convert to fraction form
    20,707.98/28,577.19 = 11,276.55/x
  3. Step 3: Cross multiply
    20,707.98x = 28,577.19 × 11,276.55
  4. Step 4: Simplify right side
    20,707.98x = 322,252,111.89
  5. Step 5: Solve for x
    x = 322,252,111.89/20,707.98
  6. Step 6: Final answer
    x = 15,561.74

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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.