Home / 15,438.32-21,296.20-9,771.36

Finding the Fourth Proportional to 15,438.32, 21,296.20 and 9,771.36

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Solution

The fourth proportional to 15,438.32, 21,296.20 and 9,771.36 is: 13,478.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,438.32 : 21,296.20 = 9,771.36 : x
  2. Step 2: Convert to fraction form
    15,438.32/21,296.20 = 9,771.36/x
  3. Step 3: Cross multiply
    15,438.32x = 21,296.20 × 9,771.36
  4. Step 4: Simplify right side
    15,438.32x = 208,092,836.83
  5. Step 5: Solve for x
    x = 208,092,836.83/15,438.32
  6. Step 6: Final answer
    x = 13,478.98

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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.