Home / 28,670.64-42,981.56-10,891.36

Finding the Fourth Proportional to 28,670.64, 42,981.56 and 10,891.36

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Solution

The fourth proportional to 28,670.64, 42,981.56 and 10,891.36 is: 16,327.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,670.64 : 42,981.56 = 10,891.36 : x
  2. Step 2: Convert to fraction form
    28,670.64/42,981.56 = 10,891.36/x
  3. Step 3: Cross multiply
    28,670.64x = 42,981.56 × 10,891.36
  4. Step 4: Simplify right side
    28,670.64x = 468,127,643.32
  5. Step 5: Solve for x
    x = 468,127,643.32/28,670.64
  6. Step 6: Final answer
    x = 16,327.77

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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.