Home / 30,640.16-42,244.28-19,865.94

Finding the Fourth Proportional to 30,640.16, 42,244.28 and 19,865.94

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Solution

The fourth proportional to 30,640.16, 42,244.28 and 19,865.94 is: 27,389.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,640.16 : 42,244.28 = 19,865.94 : x
  2. Step 2: Convert to fraction form
    30,640.16/42,244.28 = 19,865.94/x
  3. Step 3: Cross multiply
    30,640.16x = 42,244.28 × 19,865.94
  4. Step 4: Simplify right side
    30,640.16x = 839,222,232.49
  5. Step 5: Solve for x
    x = 839,222,232.49/30,640.16
  6. Step 6: Final answer
    x = 27,389.62

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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.