Home / 21,157.19-29,189.10-12,659.51

Finding the Fourth Proportional to 21,157.19, 29,189.10 and 12,659.51

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Solution

The fourth proportional to 21,157.19, 29,189.10 and 12,659.51 is: 17,465.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,157.19 : 29,189.10 = 12,659.51 : x
  2. Step 2: Convert to fraction form
    21,157.19/29,189.10 = 12,659.51/x
  3. Step 3: Cross multiply
    21,157.19x = 29,189.10 × 12,659.51
  4. Step 4: Simplify right side
    21,157.19x = 369,519,557.40
  5. Step 5: Solve for x
    x = 369,519,557.40/21,157.19
  6. Step 6: Final answer
    x = 17,465.44

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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.