Home / 15,415.20-21,271.44-8,699.53

Finding the Fourth Proportional to 15,415.20, 21,271.44 and 8,699.53

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Solution

The fourth proportional to 15,415.20, 21,271.44 and 8,699.53 is: 12,004.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,415.20 : 21,271.44 = 8,699.53 : x
  2. Step 2: Convert to fraction form
    15,415.20/21,271.44 = 8,699.53/x
  3. Step 3: Cross multiply
    15,415.20x = 21,271.44 × 8,699.53
  4. Step 4: Simplify right side
    15,415.20x = 185,051,413.46
  5. Step 5: Solve for x
    x = 185,051,413.46/15,415.20
  6. Step 6: Final answer
    x = 12,004.48

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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.