Home / 15,477.28-21,358.88-8,403.84

Finding the Fourth Proportional to 15,477.28, 21,358.88 and 8,403.84

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Solution

The fourth proportional to 15,477.28, 21,358.88 and 8,403.84 is: 11,597.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,477.28 : 21,358.88 = 8,403.84 : x
  2. Step 2: Convert to fraction form
    15,477.28/21,358.88 = 8,403.84/x
  3. Step 3: Cross multiply
    15,477.28x = 21,358.88 × 8,403.84
  4. Step 4: Simplify right side
    15,477.28x = 179,496,610.10
  5. Step 5: Solve for x
    x = 179,496,610.10/15,477.28
  6. Step 6: Final answer
    x = 11,597.43

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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.