Home / 21,970.60-30,319.49-11,899.17

Finding the Fourth Proportional to 21,970.60, 30,319.49 and 11,899.17

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Solution

The fourth proportional to 21,970.60, 30,319.49 and 11,899.17 is: 16,420.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,970.60 : 30,319.49 = 11,899.17 : x
  2. Step 2: Convert to fraction form
    21,970.60/30,319.49 = 11,899.17/x
  3. Step 3: Cross multiply
    21,970.60x = 30,319.49 × 11,899.17
  4. Step 4: Simplify right side
    21,970.60x = 360,776,765.82
  5. Step 5: Solve for x
    x = 360,776,765.82/21,970.60
  6. Step 6: Final answer
    x = 16,420.89

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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.