Home / 13,686.81-20,535.63-4,922.40

Finding the Fourth Proportional to 13,686.81, 20,535.63 and 4,922.40

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Solution

The fourth proportional to 13,686.81, 20,535.63 and 4,922.40 is: 7,385.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,686.81 : 20,535.63 = 4,922.40 : x
  2. Step 2: Convert to fraction form
    13,686.81/20,535.63 = 4,922.40/x
  3. Step 3: Cross multiply
    13,686.81x = 20,535.63 × 4,922.40
  4. Step 4: Simplify right side
    13,686.81x = 101,084,585.11
  5. Step 5: Solve for x
    x = 101,084,585.11/13,686.81
  6. Step 6: Final answer
    x = 7,385.55

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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.