Home / 20,521.64-28,319.47-11,569.15

Finding the Fourth Proportional to 20,521.64, 28,319.47 and 11,569.15

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Solution

The fourth proportional to 20,521.64, 28,319.47 and 11,569.15 is: 15,965.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,521.64 : 28,319.47 = 11,569.15 : x
  2. Step 2: Convert to fraction form
    20,521.64/28,319.47 = 11,569.15/x
  3. Step 3: Cross multiply
    20,521.64x = 28,319.47 × 11,569.15
  4. Step 4: Simplify right side
    20,521.64x = 327,632,196.35
  5. Step 5: Solve for x
    x = 327,632,196.35/20,521.64
  6. Step 6: Final answer
    x = 15,965.21

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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.