Home / 21,970.96-30,319.54-11,899.32

Finding the Fourth Proportional to 21,970.96, 30,319.54 and 11,899.32

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Solution

The fourth proportional to 21,970.96, 30,319.54 and 11,899.32 is: 16,420.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,970.96 : 30,319.54 = 11,899.32 : x
  2. Step 2: Convert to fraction form
    21,970.96/30,319.54 = 11,899.32/x
  3. Step 3: Cross multiply
    21,970.96x = 30,319.54 × 11,899.32
  4. Step 4: Simplify right side
    21,970.96x = 360,781,908.71
  5. Step 5: Solve for x
    x = 360,781,908.71/21,970.96
  6. Step 6: Final answer
    x = 16,420.85

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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.