Home / 28,166.40-38,863.80-21,440.16

Finding the Fourth Proportional to 28,166.40, 38,863.80 and 21,440.16

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Solution

The fourth proportional to 28,166.40, 38,863.80 and 21,440.16 is: 29,582.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,166.40 : 38,863.80 = 21,440.16 : x
  2. Step 2: Convert to fraction form
    28,166.40/38,863.80 = 21,440.16/x
  3. Step 3: Cross multiply
    28,166.40x = 38,863.80 × 21,440.16
  4. Step 4: Simplify right side
    28,166.40x = 833,246,090.21
  5. Step 5: Solve for x
    x = 833,246,090.21/28,166.40
  6. Step 6: Final answer
    x = 29,582.98

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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.