Home / 28,927.84-39,909.36-21,392.32

Finding the Fourth Proportional to 28,927.84, 39,909.36 and 21,392.32

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Solution

The fourth proportional to 28,927.84, 39,909.36 and 21,392.32 is: 29,513.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,927.84 : 39,909.36 = 21,392.32 : x
  2. Step 2: Convert to fraction form
    28,927.84/39,909.36 = 21,392.32/x
  3. Step 3: Cross multiply
    28,927.84x = 39,909.36 × 21,392.32
  4. Step 4: Simplify right side
    28,927.84x = 853,753,800.12
  5. Step 5: Solve for x
    x = 853,753,800.12/28,927.84
  6. Step 6: Final answer
    x = 29,513.22

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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.