Home / 30,981.80-46,421.40-17,811.20

Finding the Fourth Proportional to 30,981.80, 46,421.40 and 17,811.20

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Solution

The fourth proportional to 30,981.80, 46,421.40 and 17,811.20 is: 26,687.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,981.80 : 46,421.40 = 17,811.20 : x
  2. Step 2: Convert to fraction form
    30,981.80/46,421.40 = 17,811.20/x
  3. Step 3: Cross multiply
    30,981.80x = 46,421.40 × 17,811.20
  4. Step 4: Simplify right side
    30,981.80x = 826,820,839.68
  5. Step 5: Solve for x
    x = 826,820,839.68/30,981.80
  6. Step 6: Final answer
    x = 26,687.31

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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.