Home / 13,688.81-20,535.43-5,364.31

Finding the Fourth Proportional to 13,688.81, 20,535.43 and 5,364.31

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Solution

The fourth proportional to 13,688.81, 20,535.43 and 5,364.31 is: 8,047.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,688.81 : 20,535.43 = 5,364.31 : x
  2. Step 2: Convert to fraction form
    13,688.81/20,535.43 = 5,364.31/x
  3. Step 3: Cross multiply
    13,688.81x = 20,535.43 × 5,364.31
  4. Step 4: Simplify right side
    13,688.81x = 110,158,360.59
  5. Step 5: Solve for x
    x = 110,158,360.59/13,688.81
  6. Step 6: Final answer
    x = 8,047.33

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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.