Home / 30,527.57-42,128.47-19,911.11

Finding the Fourth Proportional to 30,527.57, 42,128.47 and 19,911.11

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Solution

The fourth proportional to 30,527.57, 42,128.47 and 19,911.11 is: 27,477.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,527.57 : 42,128.47 = 19,911.11 : x
  2. Step 2: Convert to fraction form
    30,527.57/42,128.47 = 19,911.11/x
  3. Step 3: Cross multiply
    30,527.57x = 42,128.47 × 19,911.11
  4. Step 4: Simplify right side
    30,527.57x = 838,824,600.30
  5. Step 5: Solve for x
    x = 838,824,600.30/30,527.57
  6. Step 6: Final answer
    x = 27,477.61

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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.