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Finding the Fourth Proportional to 15,800.32, 21,792 and 14,740.48

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Solution

The fourth proportional to 15,800.32, 21,792 and 14,740.48 is: 20,330.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,800.32 : 21,792 = 14,740.48 : x
  2. Step 2: Convert to fraction form
    15,800.32/21,792 = 14,740.48/x
  3. Step 3: Cross multiply
    15,800.32x = 21,792 × 14,740.48
  4. Step 4: Simplify right side
    15,800.32x = 321,224,540.16
  5. Step 5: Solve for x
    x = 321,224,540.16/15,800.32
  6. Step 6: Final answer
    x = 20,330.26

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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.