Home / 30,581.32-45,812.23-21,071.21

Finding the Fourth Proportional to 30,581.32, 45,812.23 and 21,071.21

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Solution

The fourth proportional to 30,581.32, 45,812.23 and 21,071.21 is: 31,565.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,581.32 : 45,812.23 = 21,071.21 : x
  2. Step 2: Convert to fraction form
    30,581.32/45,812.23 = 21,071.21/x
  3. Step 3: Cross multiply
    30,581.32x = 45,812.23 × 21,071.21
  4. Step 4: Simplify right side
    30,581.32x = 965,319,118.90
  5. Step 5: Solve for x
    x = 965,319,118.90/30,581.32
  6. Step 6: Final answer
    x = 31,565.65

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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.