Home / 15,646.35-21,579.40-13,753.91

Finding the Fourth Proportional to 15,646.35, 21,579.40 and 13,753.91

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Solution

The fourth proportional to 15,646.35, 21,579.40 and 13,753.91 is: 18,969.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,646.35 : 21,579.40 = 13,753.91 : x
  2. Step 2: Convert to fraction form
    15,646.35/21,579.40 = 13,753.91/x
  3. Step 3: Cross multiply
    15,646.35x = 21,579.40 × 13,753.91
  4. Step 4: Simplify right side
    15,646.35x = 296,801,207.60
  5. Step 5: Solve for x
    x = 296,801,207.60/15,646.35
  6. Step 6: Final answer
    x = 18,969.35

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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.