Home / 18,913.71-28,371.78-6,430.26

Finding the Fourth Proportional to 18,913.71, 28,371.78 and 6,430.26

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Solution

The fourth proportional to 18,913.71, 28,371.78 and 6,430.26 is: 9,645.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,913.71 : 28,371.78 = 6,430.26 : x
  2. Step 2: Convert to fraction form
    18,913.71/28,371.78 = 6,430.26/x
  3. Step 3: Cross multiply
    18,913.71x = 28,371.78 × 6,430.26
  4. Step 4: Simplify right side
    18,913.71x = 182,437,922.06
  5. Step 5: Solve for x
    x = 182,437,922.06/18,913.71
  6. Step 6: Final answer
    x = 9,645.80

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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.