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Finding the Fourth Proportional to 38,145, 52,643.34 and 21,381.24

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Solution

The fourth proportional to 38,145, 52,643.34 and 21,381.24 is: 29,507.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,145 : 52,643.34 = 21,381.24 : x
  2. Step 2: Convert to fraction form
    38,145/52,643.34 = 21,381.24/x
  3. Step 3: Cross multiply
    38,145x = 52,643.34 × 21,381.24
  4. Step 4: Simplify right side
    38,145x = 1,125,579,886.94
  5. Step 5: Solve for x
    x = 1,125,579,886.94/38,145
  6. Step 6: Final answer
    x = 29,507.93

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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.