Home / 30,256.71-45,337.65-19,139.92

Finding the Fourth Proportional to 30,256.71, 45,337.65 and 19,139.92

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Solution

The fourth proportional to 30,256.71, 45,337.65 and 19,139.92 is: 28,679.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,256.71 : 45,337.65 = 19,139.92 : x
  2. Step 2: Convert to fraction form
    30,256.71/45,337.65 = 19,139.92/x
  3. Step 3: Cross multiply
    30,256.71x = 45,337.65 × 19,139.92
  4. Step 4: Simplify right side
    30,256.71x = 867,758,993.99
  5. Step 5: Solve for x
    x = 867,758,993.99/30,256.71
  6. Step 6: Final answer
    x = 28,679.89

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.