Home / 21,999.04-30,356.80-12,565.76

Finding the Fourth Proportional to 21,999.04, 30,356.80 and 12,565.76

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Solution

The fourth proportional to 21,999.04, 30,356.80 and 12,565.76 is: 17,339.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,999.04 : 30,356.80 = 12,565.76 : x
  2. Step 2: Convert to fraction form
    21,999.04/30,356.80 = 12,565.76/x
  3. Step 3: Cross multiply
    21,999.04x = 30,356.80 × 12,565.76
  4. Step 4: Simplify right side
    21,999.04x = 381,456,263.17
  5. Step 5: Solve for x
    x = 381,456,263.17/21,999.04
  6. Step 6: Final answer
    x = 17,339.68

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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.