Home / 15,381.04-21,220.98-8,665.60

Finding the Fourth Proportional to 15,381.04, 21,220.98 and 8,665.60

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Solution

The fourth proportional to 15,381.04, 21,220.98 and 8,665.60 is: 11,955.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,381.04 : 21,220.98 = 8,665.60 : x
  2. Step 2: Convert to fraction form
    15,381.04/21,220.98 = 8,665.60/x
  3. Step 3: Cross multiply
    15,381.04x = 21,220.98 × 8,665.60
  4. Step 4: Simplify right side
    15,381.04x = 183,892,524.29
  5. Step 5: Solve for x
    x = 183,892,524.29/15,381.04
  6. Step 6: Final answer
    x = 11,955.79

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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.