Home / 20,639.61-28,483.18-11,208.17

Finding the Fourth Proportional to 20,639.61, 28,483.18 and 11,208.17

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Solution

The fourth proportional to 20,639.61, 28,483.18 and 11,208.17 is: 15,467.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,639.61 : 28,483.18 = 11,208.17 : x
  2. Step 2: Convert to fraction form
    20,639.61/28,483.18 = 11,208.17/x
  3. Step 3: Cross multiply
    20,639.61x = 28,483.18 × 11,208.17
  4. Step 4: Simplify right side
    20,639.61x = 319,244,366.77
  5. Step 5: Solve for x
    x = 319,244,366.77/20,639.61
  6. Step 6: Final answer
    x = 15,467.56

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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.