Home / 31,780.02-47,678.14-18,643.98

Finding the Fourth Proportional to 31,780.02, 47,678.14 and 18,643.98

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Solution

The fourth proportional to 31,780.02, 47,678.14 and 18,643.98 is: 27,970.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,780.02 : 47,678.14 = 18,643.98 : x
  2. Step 2: Convert to fraction form
    31,780.02/47,678.14 = 18,643.98/x
  3. Step 3: Cross multiply
    31,780.02x = 47,678.14 × 18,643.98
  4. Step 4: Simplify right side
    31,780.02x = 888,910,288.60
  5. Step 5: Solve for x
    x = 888,910,288.60/31,780.02
  6. Step 6: Final answer
    x = 27,970.73

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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.