Home / 30,808.29-42,515.91-17,379.81

Finding the Fourth Proportional to 30,808.29, 42,515.91 and 17,379.81

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Solution

The fourth proportional to 30,808.29, 42,515.91 and 17,379.81 is: 23,984.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,808.29 : 42,515.91 = 17,379.81 : x
  2. Step 2: Convert to fraction form
    30,808.29/42,515.91 = 17,379.81/x
  3. Step 3: Cross multiply
    30,808.29x = 42,515.91 × 17,379.81
  4. Step 4: Simplify right side
    30,808.29x = 738,918,437.78
  5. Step 5: Solve for x
    x = 738,918,437.78/30,808.29
  6. Step 6: Final answer
    x = 23,984.40

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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.