Home / 20,709.65-31,215.98-18,934.76

Finding the Fourth Proportional to 20,709.65, 31,215.98 and 18,934.76

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Solution

The fourth proportional to 20,709.65, 31,215.98 and 18,934.76 is: 28,540.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,709.65 : 31,215.98 = 18,934.76 : x
  2. Step 2: Convert to fraction form
    20,709.65/31,215.98 = 18,934.76/x
  3. Step 3: Cross multiply
    20,709.65x = 31,215.98 × 18,934.76
  4. Step 4: Simplify right side
    20,709.65x = 591,066,838.71
  5. Step 5: Solve for x
    x = 591,066,838.71/20,709.65
  6. Step 6: Final answer
    x = 28,540.66

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.