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Finding the Fourth Proportional to 31,978.90, 44,130.91 and 18,552.74

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Solution

The fourth proportional to 31,978.90, 44,130.91 and 18,552.74 is: 25,602.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,978.90 : 44,130.91 = 18,552.74 : x
  2. Step 2: Convert to fraction form
    31,978.90/44,130.91 = 18,552.74/x
  3. Step 3: Cross multiply
    31,978.90x = 44,130.91 × 18,552.74
  4. Step 4: Simplify right side
    31,978.90x = 818,749,299.19
  5. Step 5: Solve for x
    x = 818,749,299.19/31,978.90
  6. Step 6: Final answer
    x = 25,602.80

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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.