Home / 31,989.09-47,967.54-18,666.63

Finding the Fourth Proportional to 31,989.09, 47,967.54 and 18,666.63

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Solution

The fourth proportional to 31,989.09, 47,967.54 and 18,666.63 is: 27,990.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,989.09 : 47,967.54 = 18,666.63 : x
  2. Step 2: Convert to fraction form
    31,989.09/47,967.54 = 18,666.63/x
  3. Step 3: Cross multiply
    31,989.09x = 47,967.54 × 18,666.63
  4. Step 4: Simplify right side
    31,989.09x = 895,392,321.19
  5. Step 5: Solve for x
    x = 895,392,321.19/31,989.09
  6. Step 6: Final answer
    x = 27,990.55

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1.5x scale

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.