Home / 31,720.17-47,530.80-11,987.94

Finding the Fourth Proportional to 31,720.17, 47,530.80 and 11,987.94

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Solution

The fourth proportional to 31,720.17, 47,530.80 and 11,987.94 is: 17,963.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,720.17 : 47,530.80 = 11,987.94 : x
  2. Step 2: Convert to fraction form
    31,720.17/47,530.80 = 11,987.94/x
  3. Step 3: Cross multiply
    31,720.17x = 47,530.80 × 11,987.94
  4. Step 4: Simplify right side
    31,720.17x = 569,796,378.55
  5. Step 5: Solve for x
    x = 569,796,378.55/31,720.17
  6. Step 6: Final answer
    x = 17,963.22

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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.