Home / 28,252.84-38,987.82-15,678.40

Finding the Fourth Proportional to 28,252.84, 38,987.82 and 15,678.40

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Solution

The fourth proportional to 28,252.84, 38,987.82 and 15,678.40 is: 21,635.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,252.84 : 38,987.82 = 15,678.40 : x
  2. Step 2: Convert to fraction form
    28,252.84/38,987.82 = 15,678.40/x
  3. Step 3: Cross multiply
    28,252.84x = 38,987.82 × 15,678.40
  4. Step 4: Simplify right side
    28,252.84x = 611,266,637.09
  5. Step 5: Solve for x
    x = 611,266,637.09/28,252.84
  6. Step 6: Final answer
    x = 21,635.58

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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.