Home / 15,855.03-21,880.23-9,139.50

Finding the Fourth Proportional to 15,855.03, 21,880.23 and 9,139.50

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Solution

The fourth proportional to 15,855.03, 21,880.23 and 9,139.50 is: 12,612.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,855.03 : 21,880.23 = 9,139.50 : x
  2. Step 2: Convert to fraction form
    15,855.03/21,880.23 = 9,139.50/x
  3. Step 3: Cross multiply
    15,855.03x = 21,880.23 × 9,139.50
  4. Step 4: Simplify right side
    15,855.03x = 199,974,362.09
  5. Step 5: Solve for x
    x = 199,974,362.09/15,855.03
  6. Step 6: Final answer
    x = 12,612.68

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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.