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Finding the Fourth Proportional to 30,417.47, 41,971.97 and 16,987.01

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Solution

The fourth proportional to 30,417.47, 41,971.97 and 16,987.01 is: 23,439.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,417.47 : 41,971.97 = 16,987.01 : x
  2. Step 2: Convert to fraction form
    30,417.47/41,971.97 = 16,987.01/x
  3. Step 3: Cross multiply
    30,417.47x = 41,971.97 × 16,987.01
  4. Step 4: Simplify right side
    30,417.47x = 712,978,189.17
  5. Step 5: Solve for x
    x = 712,978,189.17/30,417.47
  6. Step 6: Final answer
    x = 23,439.76

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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.