Home / 15,120.28-20,866.08-8,406.54

Finding the Fourth Proportional to 15,120.28, 20,866.08 and 8,406.54

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Solution

The fourth proportional to 15,120.28, 20,866.08 and 8,406.54 is: 11,601.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,120.28 : 20,866.08 = 8,406.54 : x
  2. Step 2: Convert to fraction form
    15,120.28/20,866.08 = 8,406.54/x
  3. Step 3: Cross multiply
    15,120.28x = 20,866.08 × 8,406.54
  4. Step 4: Simplify right side
    15,120.28x = 175,411,536.16
  5. Step 5: Solve for x
    x = 175,411,536.16/15,120.28
  6. Step 6: Final answer
    x = 11,601.08

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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.