Home / 10,479.76-15,720.58-2,688.64

Finding the Fourth Proportional to 10,479.76, 15,720.58 and 2,688.64

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Solution

The fourth proportional to 10,479.76, 15,720.58 and 2,688.64 is: 4,033.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,479.76 : 15,720.58 = 2,688.64 : x
  2. Step 2: Convert to fraction form
    10,479.76/15,720.58 = 2,688.64/x
  3. Step 3: Cross multiply
    10,479.76x = 15,720.58 × 2,688.64
  4. Step 4: Simplify right side
    10,479.76x = 42,266,980.21
  5. Step 5: Solve for x
    x = 42,266,980.21/10,479.76
  6. Step 6: Final answer
    x = 4,033.20

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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.