Home / 20,358.81-30,376.35-17,865.63

Finding the Fourth Proportional to 20,358.81, 30,376.35 and 17,865.63

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Solution

The fourth proportional to 20,358.81, 30,376.35 and 17,865.63 is: 26,656.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,358.81 : 30,376.35 = 17,865.63 : x
  2. Step 2: Convert to fraction form
    20,358.81/30,376.35 = 17,865.63/x
  3. Step 3: Cross multiply
    20,358.81x = 30,376.35 × 17,865.63
  4. Step 4: Simplify right side
    20,358.81x = 542,692,629.85
  5. Step 5: Solve for x
    x = 542,692,629.85/20,358.81
  6. Step 6: Final answer
    x = 26,656.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.