Home / 14,139.18-21,175.95-13,647.12

Finding the Fourth Proportional to 14,139.18, 21,175.95 and 13,647.12

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Solution

The fourth proportional to 14,139.18, 21,175.95 and 13,647.12 is: 20,439.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,139.18 : 21,175.95 = 13,647.12 : x
  2. Step 2: Convert to fraction form
    14,139.18/21,175.95 = 13,647.12/x
  3. Step 3: Cross multiply
    14,139.18x = 21,175.95 × 13,647.12
  4. Step 4: Simplify right side
    14,139.18x = 288,990,730.76
  5. Step 5: Solve for x
    x = 288,990,730.76/14,139.18
  6. Step 6: Final answer
    x = 20,439.00

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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.