Home / 10,521.88-15,784.38-4,980.60

Finding the Fourth Proportional to 10,521.88, 15,784.38 and 4,980.60

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Solution

The fourth proportional to 10,521.88, 15,784.38 and 4,980.60 is: 7,471.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,521.88 : 15,784.38 = 4,980.60 : x
  2. Step 2: Convert to fraction form
    10,521.88/15,784.38 = 4,980.60/x
  3. Step 3: Cross multiply
    10,521.88x = 15,784.38 × 4,980.60
  4. Step 4: Simplify right side
    10,521.88x = 78,615,683.03
  5. Step 5: Solve for x
    x = 78,615,683.03/10,521.88
  6. Step 6: Final answer
    x = 7,471.64

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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.