Home / 15,845.40-21,865.14-8,770.68

Finding the Fourth Proportional to 15,845.40, 21,865.14 and 8,770.68

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Solution

The fourth proportional to 15,845.40, 21,865.14 and 8,770.68 is: 12,102.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,845.40 : 21,865.14 = 8,770.68 : x
  2. Step 2: Convert to fraction form
    15,845.40/21,865.14 = 8,770.68/x
  3. Step 3: Cross multiply
    15,845.40x = 21,865.14 × 8,770.68
  4. Step 4: Simplify right side
    15,845.40x = 191,772,146.10
  5. Step 5: Solve for x
    x = 191,772,146.10/15,845.40
  6. Step 6: Final answer
    x = 12,102.70

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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.