Home / 20,486.95-30,720.12-9,950.35

Finding the Fourth Proportional to 20,486.95, 30,720.12 and 9,950.35

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Solution

The fourth proportional to 20,486.95, 30,720.12 and 9,950.35 is: 14,920.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,486.95 : 30,720.12 = 9,950.35 : x
  2. Step 2: Convert to fraction form
    20,486.95/30,720.12 = 9,950.35/x
  3. Step 3: Cross multiply
    20,486.95x = 30,720.12 × 9,950.35
  4. Step 4: Simplify right side
    20,486.95x = 305,675,946.04
  5. Step 5: Solve for x
    x = 305,675,946.04/20,486.95
  6. Step 6: Final answer
    x = 14,920.52

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.