Home / 30,478.75-42,069.13-17,734.40

Finding the Fourth Proportional to 30,478.75, 42,069.13 and 17,734.40

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Solution

The fourth proportional to 30,478.75, 42,069.13 and 17,734.40 is: 24,478.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,478.75 : 42,069.13 = 17,734.40 : x
  2. Step 2: Convert to fraction form
    30,478.75/42,069.13 = 17,734.40/x
  3. Step 3: Cross multiply
    30,478.75x = 42,069.13 × 17,734.40
  4. Step 4: Simplify right side
    30,478.75x = 746,070,779.07
  5. Step 5: Solve for x
    x = 746,070,779.07/30,478.75
  6. Step 6: Final answer
    x = 24,478.39

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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.