Home / 47,639.32-71,457.76-12,579.28

Finding the Fourth Proportional to 47,639.32, 71,457.76 and 12,579.28

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Solution

The fourth proportional to 47,639.32, 71,457.76 and 12,579.28 is: 18,868.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    47,639.32 : 71,457.76 = 12,579.28 : x
  2. Step 2: Convert to fraction form
    47,639.32/71,457.76 = 12,579.28/x
  3. Step 3: Cross multiply
    47,639.32x = 71,457.76 × 12,579.28
  4. Step 4: Simplify right side
    47,639.32x = 898,887,171.21
  5. Step 5: Solve for x
    x = 898,887,171.21/47,639.32
  6. Step 6: Final answer
    x = 18,868.60

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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.