Home / 15,434.40-21,297.96-9,145.56

Finding the Fourth Proportional to 15,434.40, 21,297.96 and 9,145.56

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Solution

The fourth proportional to 15,434.40, 21,297.96 and 9,145.56 is: 12,619.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,434.40 : 21,297.96 = 9,145.56 : x
  2. Step 2: Convert to fraction form
    15,434.40/21,297.96 = 9,145.56/x
  3. Step 3: Cross multiply
    15,434.40x = 21,297.96 × 9,145.56
  4. Step 4: Simplify right side
    15,434.40x = 194,781,771.06
  5. Step 5: Solve for x
    x = 194,781,771.06/15,434.40
  6. Step 6: Final answer
    x = 12,619.98

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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.