Home / 21,830.06-30,123.68-12,400.04

Finding the Fourth Proportional to 21,830.06, 30,123.68 and 12,400.04

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Solution

The fourth proportional to 21,830.06, 30,123.68 and 12,400.04 is: 17,111.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,830.06 : 30,123.68 = 12,400.04 : x
  2. Step 2: Convert to fraction form
    21,830.06/30,123.68 = 12,400.04/x
  3. Step 3: Cross multiply
    21,830.06x = 30,123.68 × 12,400.04
  4. Step 4: Simplify right side
    21,830.06x = 373,534,836.95
  5. Step 5: Solve for x
    x = 373,534,836.95/21,830.06
  6. Step 6: Final answer
    x = 17,111.03

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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.