Home / 15,355.70-21,190.61-8,641.32

Finding the Fourth Proportional to 15,355.70, 21,190.61 and 8,641.32

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Solution

The fourth proportional to 15,355.70, 21,190.61 and 8,641.32 is: 11,924.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,355.70 : 21,190.61 = 8,641.32 : x
  2. Step 2: Convert to fraction form
    15,355.70/21,190.61 = 8,641.32/x
  3. Step 3: Cross multiply
    15,355.70x = 21,190.61 × 8,641.32
  4. Step 4: Simplify right side
    15,355.70x = 183,114,842.01
  5. Step 5: Solve for x
    x = 183,114,842.01/15,355.70
  6. Step 6: Final answer
    x = 11,924.88

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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.