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Finding the Fourth Proportional to 38,894.71, 53,674.08 and 21,898.91

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Solution

The fourth proportional to 38,894.71, 53,674.08 and 21,898.91 is: 30,220.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,894.71 : 53,674.08 = 21,898.91 : x
  2. Step 2: Convert to fraction form
    38,894.71/53,674.08 = 21,898.91/x
  3. Step 3: Cross multiply
    38,894.71x = 53,674.08 × 21,898.91
  4. Step 4: Simplify right side
    38,894.71x = 1,175,403,847.25
  5. Step 5: Solve for x
    x = 1,175,403,847.25/38,894.71
  6. Step 6: Final answer
    x = 30,220.15

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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.