Home / 15,865.60-21,936.30-13,897.30

Finding the Fourth Proportional to 15,865.60, 21,936.30 and 13,897.30

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Solution

The fourth proportional to 15,865.60, 21,936.30 and 13,897.30 is: 19,214.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,865.60 : 21,936.30 = 13,897.30 : x
  2. Step 2: Convert to fraction form
    15,865.60/21,936.30 = 13,897.30/x
  3. Step 3: Cross multiply
    15,865.60x = 21,936.30 × 13,897.30
  4. Step 4: Simplify right side
    15,865.60x = 304,855,341.99
  5. Step 5: Solve for x
    x = 304,855,341.99/15,865.60
  6. Step 6: Final answer
    x = 19,214.86

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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.