Home / 30,934.03-42,688.51-18,188.65

Finding the Fourth Proportional to 30,934.03, 42,688.51 and 18,188.65

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Solution

The fourth proportional to 30,934.03, 42,688.51 and 18,188.65 is: 25,100.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,934.03 : 42,688.51 = 18,188.65 : x
  2. Step 2: Convert to fraction form
    30,934.03/42,688.51 = 18,188.65/x
  3. Step 3: Cross multiply
    30,934.03x = 42,688.51 × 18,188.65
  4. Step 4: Simplify right side
    30,934.03x = 776,446,367.41
  5. Step 5: Solve for x
    x = 776,446,367.41/30,934.03
  6. Step 6: Final answer
    x = 25,100.07

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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.