Home / 31,106.80-46,660.20-21,127.60

Finding the Fourth Proportional to 31,106.80, 46,660.20 and 21,127.60

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Solution

The fourth proportional to 31,106.80, 46,660.20 and 21,127.60 is: 31,691.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,106.80 : 46,660.20 = 21,127.60 : x
  2. Step 2: Convert to fraction form
    31,106.80/46,660.20 = 21,127.60/x
  3. Step 3: Cross multiply
    31,106.80x = 46,660.20 × 21,127.60
  4. Step 4: Simplify right side
    31,106.80x = 985,818,041.52
  5. Step 5: Solve for x
    x = 985,818,041.52/31,106.80
  6. Step 6: Final answer
    x = 31,691.40

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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.