Home / 31,121.68-42,947.40-16,973.68

Finding the Fourth Proportional to 31,121.68, 42,947.40 and 16,973.68

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Solution

The fourth proportional to 31,121.68, 42,947.40 and 16,973.68 is: 23,423.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,121.68 : 42,947.40 = 16,973.68 : x
  2. Step 2: Convert to fraction form
    31,121.68/42,947.40 = 16,973.68/x
  3. Step 3: Cross multiply
    31,121.68x = 42,947.40 × 16,973.68
  4. Step 4: Simplify right side
    31,121.68x = 728,975,424.43
  5. Step 5: Solve for x
    x = 728,975,424.43/31,121.68
  6. Step 6: Final answer
    x = 23,423.40

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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.