Home / 28,881.74-39,837.39-21,730.25

Finding the Fourth Proportional to 28,881.74, 39,837.39 and 21,730.25

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Solution

The fourth proportional to 28,881.74, 39,837.39 and 21,730.25 is: 29,973.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,881.74 : 39,837.39 = 21,730.25 : x
  2. Step 2: Convert to fraction form
    28,881.74/39,837.39 = 21,730.25/x
  3. Step 3: Cross multiply
    28,881.74x = 39,837.39 × 21,730.25
  4. Step 4: Simplify right side
    28,881.74x = 865,676,444.05
  5. Step 5: Solve for x
    x = 865,676,444.05/28,881.74
  6. Step 6: Final answer
    x = 29,973.14

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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.