Home / 15,140.79-20,893.75-8,426.70

Finding the Fourth Proportional to 15,140.79, 20,893.75 and 8,426.70

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Solution

The fourth proportional to 15,140.79, 20,893.75 and 8,426.70 is: 11,628.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,140.79 : 20,893.75 = 8,426.70 : x
  2. Step 2: Convert to fraction form
    15,140.79/20,893.75 = 8,426.70/x
  3. Step 3: Cross multiply
    15,140.79x = 20,893.75 × 8,426.70
  4. Step 4: Simplify right side
    15,140.79x = 176,065,342.06
  5. Step 5: Solve for x
    x = 176,065,342.06/15,140.79
  6. Step 6: Final answer
    x = 11,628.54

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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.