Home / 15,518.28-21,415.68-8,445.16

Finding the Fourth Proportional to 15,518.28, 21,415.68 and 8,445.16

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Solution

The fourth proportional to 15,518.28, 21,415.68 and 8,445.16 is: 11,654.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,518.28 : 21,415.68 = 8,445.16 : x
  2. Step 2: Convert to fraction form
    15,518.28/21,415.68 = 8,445.16/x
  3. Step 3: Cross multiply
    15,518.28x = 21,415.68 × 8,445.16
  4. Step 4: Simplify right side
    15,518.28x = 180,858,844.11
  5. Step 5: Solve for x
    x = 180,858,844.11/15,518.28
  6. Step 6: Final answer
    x = 11,654.57

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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.