Home / 28,120.77-38,805.99-15,374.04

Finding the Fourth Proportional to 28,120.77, 38,805.99 and 15,374.04

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Solution

The fourth proportional to 28,120.77, 38,805.99 and 15,374.04 is: 21,215.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,120.77 : 38,805.99 = 15,374.04 : x
  2. Step 2: Convert to fraction form
    28,120.77/38,805.99 = 15,374.04/x
  3. Step 3: Cross multiply
    28,120.77x = 38,805.99 × 15,374.04
  4. Step 4: Simplify right side
    28,120.77x = 596,604,639.32
  5. Step 5: Solve for x
    x = 596,604,639.32/28,120.77
  6. Step 6: Final answer
    x = 21,215.80

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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.