Home / 31,688.85-43,685.52-21,604.35

Finding the Fourth Proportional to 31,688.85, 43,685.52 and 21,604.35

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Solution

The fourth proportional to 31,688.85, 43,685.52 and 21,604.35 is: 29,783.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,688.85 : 43,685.52 = 21,604.35 : x
  2. Step 2: Convert to fraction form
    31,688.85/43,685.52 = 21,604.35/x
  3. Step 3: Cross multiply
    31,688.85x = 43,685.52 × 21,604.35
  4. Step 4: Simplify right side
    31,688.85x = 943,797,264.01
  5. Step 5: Solve for x
    x = 943,797,264.01/31,688.85
  6. Step 6: Final answer
    x = 29,783.26

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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.