Home / 28,087.20-38,762.88-15,516

Finding the Fourth Proportional to 28,087.20, 38,762.88 and 15,516

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Solution

The fourth proportional to 28,087.20, 38,762.88 and 15,516 is: 21,413.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,087.20 : 38,762.88 = 15,516 : x
  2. Step 2: Convert to fraction form
    28,087.20/38,762.88 = 15,516/x
  3. Step 3: Cross multiply
    28,087.20x = 38,762.88 × 15,516
  4. Step 4: Simplify right side
    28,087.20x = 601,444,846.08
  5. Step 5: Solve for x
    x = 601,444,846.08/28,087.20
  6. Step 6: Final answer
    x = 21,413.49

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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.