Home / 30,379.32-41,931.16-18,127.91

Finding the Fourth Proportional to 30,379.32, 41,931.16 and 18,127.91

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Solution

The fourth proportional to 30,379.32, 41,931.16 and 18,127.91 is: 25,021.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,379.32 : 41,931.16 = 18,127.91 : x
  2. Step 2: Convert to fraction form
    30,379.32/41,931.16 = 18,127.91/x
  3. Step 3: Cross multiply
    30,379.32x = 41,931.16 × 18,127.91
  4. Step 4: Simplify right side
    30,379.32x = 760,124,354.18
  5. Step 5: Solve for x
    x = 760,124,354.18/30,379.32
  6. Step 6: Final answer
    x = 25,021.11

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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.