Home / 28,087.04-38,742.32-21,357.92

Finding the Fourth Proportional to 28,087.04, 38,742.32 and 21,357.92

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Solution

The fourth proportional to 28,087.04, 38,742.32 and 21,357.92 is: 29,460.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,087.04 : 38,742.32 = 21,357.92 : x
  2. Step 2: Convert to fraction form
    28,087.04/38,742.32 = 21,357.92/x
  3. Step 3: Cross multiply
    28,087.04x = 38,742.32 × 21,357.92
  4. Step 4: Simplify right side
    28,087.04x = 827,455,070.67
  5. Step 5: Solve for x
    x = 827,455,070.67/28,087.04
  6. Step 6: Final answer
    x = 29,460.39

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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.