Home / 38,718.43-53,431.20-21,490.62

Finding the Fourth Proportional to 38,718.43, 53,431.20 and 21,490.62

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Solution

The fourth proportional to 38,718.43, 53,431.20 and 21,490.62 is: 29,656.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,718.43 : 53,431.20 = 21,490.62 : x
  2. Step 2: Convert to fraction form
    38,718.43/53,431.20 = 21,490.62/x
  3. Step 3: Cross multiply
    38,718.43x = 53,431.20 × 21,490.62
  4. Step 4: Simplify right side
    38,718.43x = 1,148,269,615.34
  5. Step 5: Solve for x
    x = 1,148,269,615.34/38,718.43
  6. Step 6: Final answer
    x = 29,656.93

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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.