Home / 13,509.12-20,266.80-4,275.12

Finding the Fourth Proportional to 13,509.12, 20,266.80 and 4,275.12

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Solution

The fourth proportional to 13,509.12, 20,266.80 and 4,275.12 is: 6,413.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,509.12 : 20,266.80 = 4,275.12 : x
  2. Step 2: Convert to fraction form
    13,509.12/20,266.80 = 4,275.12/x
  3. Step 3: Cross multiply
    13,509.12x = 20,266.80 × 4,275.12
  4. Step 4: Simplify right side
    13,509.12x = 86,643,002.02
  5. Step 5: Solve for x
    x = 86,643,002.02/13,509.12
  6. Step 6: Final answer
    x = 6,413.67

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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.