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Finding the Fourth Proportional to 35,894.40, 49,533.84 and 20,990.40

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Solution

The fourth proportional to 35,894.40, 49,533.84 and 20,990.40 is: 28,966.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    35,894.40 : 49,533.84 = 20,990.40 : x
  2. Step 2: Convert to fraction form
    35,894.40/49,533.84 = 20,990.40/x
  3. Step 3: Cross multiply
    35,894.40x = 49,533.84 × 20,990.40
  4. Step 4: Simplify right side
    35,894.40x = 1,039,735,115.14
  5. Step 5: Solve for x
    x = 1,039,735,115.14/35,894.40
  6. Step 6: Final answer
    x = 28,966.50

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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.