Home / 42,915.75-64,378.08-11,751

Finding the Fourth Proportional to 42,915.75, 64,378.08 and 11,751

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Solution

The fourth proportional to 42,915.75, 64,378.08 and 11,751 is: 17,627.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,915.75 : 64,378.08 = 11,751 : x
  2. Step 2: Convert to fraction form
    42,915.75/64,378.08 = 11,751/x
  3. Step 3: Cross multiply
    42,915.75x = 64,378.08 × 11,751
  4. Step 4: Simplify right side
    42,915.75x = 756,506,818.08
  5. Step 5: Solve for x
    x = 756,506,818.08/42,915.75
  6. Step 6: Final answer
    x = 17,627.72

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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.