Home / 13,580.65-18,740.77-7,915.69

Finding the Fourth Proportional to 13,580.65, 18,740.77 and 7,915.69

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Solution

The fourth proportional to 13,580.65, 18,740.77 and 7,915.69 is: 10,923.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,580.65 : 18,740.77 = 7,915.69 : x
  2. Step 2: Convert to fraction form
    13,580.65/18,740.77 = 7,915.69/x
  3. Step 3: Cross multiply
    13,580.65x = 18,740.77 × 7,915.69
  4. Step 4: Simplify right side
    13,580.65x = 148,346,125.68
  5. Step 5: Solve for x
    x = 148,346,125.68/13,580.65
  6. Step 6: Final answer
    x = 10,923.35

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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.