Home / 21,746.84-30,006.52-20,639.57

Finding the Fourth Proportional to 21,746.84, 30,006.52 and 20,639.57

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Solution

The fourth proportional to 21,746.84, 30,006.52 and 20,639.57 is: 28,478.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,746.84 : 30,006.52 = 20,639.57 : x
  2. Step 2: Convert to fraction form
    21,746.84/30,006.52 = 20,639.57/x
  3. Step 3: Cross multiply
    21,746.84x = 30,006.52 × 20,639.57
  4. Step 4: Simplify right side
    21,746.84x = 619,321,468.36
  5. Step 5: Solve for x
    x = 619,321,468.36/21,746.84
  6. Step 6: Final answer
    x = 28,478.69

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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.