Home / 21,018.32-31,525.04-5,434.72

Finding the Fourth Proportional to 21,018.32, 31,525.04 and 5,434.72

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Solution

The fourth proportional to 21,018.32, 31,525.04 and 5,434.72 is: 8,151.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,018.32 : 31,525.04 = 5,434.72 : x
  2. Step 2: Convert to fraction form
    21,018.32/31,525.04 = 5,434.72/x
  3. Step 3: Cross multiply
    21,018.32x = 31,525.04 × 5,434.72
  4. Step 4: Simplify right side
    21,018.32x = 171,329,765.39
  5. Step 5: Solve for x
    x = 171,329,765.39/21,018.32
  6. Step 6: Final answer
    x = 8,151.45

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.