Home / 13,571.64-18,728.91-7,909.74

Finding the Fourth Proportional to 13,571.64, 18,728.91 and 7,909.74

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Solution

The fourth proportional to 13,571.64, 18,728.91 and 7,909.74 is: 10,915.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,571.64 : 18,728.91 = 7,909.74 : x
  2. Step 2: Convert to fraction form
    13,571.64/18,728.91 = 7,909.74/x
  3. Step 3: Cross multiply
    13,571.64x = 18,728.91 × 7,909.74
  4. Step 4: Simplify right side
    13,571.64x = 148,140,808.58
  5. Step 5: Solve for x
    x = 148,140,808.58/13,571.64
  6. Step 6: Final answer
    x = 10,915.47

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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.