Home / 21,980.08-30,338.04-12,554.20

Finding the Fourth Proportional to 21,980.08, 30,338.04 and 12,554.20

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Solution

The fourth proportional to 21,980.08, 30,338.04 and 12,554.20 is: 17,327.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,980.08 : 30,338.04 = 12,554.20 : x
  2. Step 2: Convert to fraction form
    21,980.08/30,338.04 = 12,554.20/x
  3. Step 3: Cross multiply
    21,980.08x = 30,338.04 × 12,554.20
  4. Step 4: Simplify right side
    21,980.08x = 380,869,821.77
  5. Step 5: Solve for x
    x = 380,869,821.77/21,980.08
  6. Step 6: Final answer
    x = 17,327.95

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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.