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Finding the Fourth Proportional to 38,703, 53,410.76 and 21,711.03

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Solution

The fourth proportional to 38,703, 53,410.76 and 21,711.03 is: 29,961.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,703 : 53,410.76 = 21,711.03 : x
  2. Step 2: Convert to fraction form
    38,703/53,410.76 = 21,711.03/x
  3. Step 3: Cross multiply
    38,703x = 53,410.76 × 21,711.03
  4. Step 4: Simplify right side
    38,703x = 1,159,602,612.68
  5. Step 5: Solve for x
    x = 1,159,602,612.68/38,703
  6. Step 6: Final answer
    x = 29,961.57

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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.