Home / 38,684.67-53,387.10-21,688.08

Finding the Fourth Proportional to 38,684.67, 53,387.10 and 21,688.08

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Solution

The fourth proportional to 38,684.67, 53,387.10 and 21,688.08 is: 29,930.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,684.67 : 53,387.10 = 21,688.08 : x
  2. Step 2: Convert to fraction form
    38,684.67/53,387.10 = 21,688.08/x
  3. Step 3: Cross multiply
    38,684.67x = 53,387.10 × 21,688.08
  4. Step 4: Simplify right side
    38,684.67x = 1,157,863,695.77
  5. Step 5: Solve for x
    x = 1,157,863,695.77/38,684.67
  6. Step 6: Final answer
    x = 29,930.81

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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.