Home / 15,869.10-21,941.13-13,900.80

Finding the Fourth Proportional to 15,869.10, 21,941.13 and 13,900.80

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Solution

The fourth proportional to 15,869.10, 21,941.13 and 13,900.80 is: 19,219.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,869.10 : 21,941.13 = 13,900.80 : x
  2. Step 2: Convert to fraction form
    15,869.10/21,941.13 = 13,900.80/x
  3. Step 3: Cross multiply
    15,869.10x = 21,941.13 × 13,900.80
  4. Step 4: Simplify right side
    15,869.10x = 304,999,259.90
  5. Step 5: Solve for x
    x = 304,999,259.90/15,869.10
  6. Step 6: Final answer
    x = 19,219.69

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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.