Home / 13,289.50-18,339.40-7,915.62

Finding the Fourth Proportional to 13,289.50, 18,339.40 and 7,915.62

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Solution

The fourth proportional to 13,289.50, 18,339.40 and 7,915.62 is: 10,923.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,289.50 : 18,339.40 = 7,915.62 : x
  2. Step 2: Convert to fraction form
    13,289.50/18,339.40 = 7,915.62/x
  3. Step 3: Cross multiply
    13,289.50x = 18,339.40 × 7,915.62
  4. Step 4: Simplify right side
    13,289.50x = 145,167,721.43
  5. Step 5: Solve for x
    x = 145,167,721.43/13,289.50
  6. Step 6: Final answer
    x = 10,923.49

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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.