Home / 28,258.32-42,378.66-9,786

Finding the Fourth Proportional to 28,258.32, 42,378.66 and 9,786

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Solution

The fourth proportional to 28,258.32, 42,378.66 and 9,786 is: 14,675.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,258.32 : 42,378.66 = 9,786 : x
  2. Step 2: Convert to fraction form
    28,258.32/42,378.66 = 9,786/x
  3. Step 3: Cross multiply
    28,258.32x = 42,378.66 × 9,786
  4. Step 4: Simplify right side
    28,258.32x = 414,717,566.76
  5. Step 5: Solve for x
    x = 414,717,566.76/28,258.32
  6. Step 6: Final answer
    x = 14,675.95

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.