Home / 13,878.80-19,153.98-7,909.22

Finding the Fourth Proportional to 13,878.80, 19,153.98 and 7,909.22

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Solution

The fourth proportional to 13,878.80, 19,153.98 and 7,909.22 is: 10,915.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,878.80 : 19,153.98 = 7,909.22 : x
  2. Step 2: Convert to fraction form
    13,878.80/19,153.98 = 7,909.22/x
  3. Step 3: Cross multiply
    13,878.80x = 19,153.98 × 7,909.22
  4. Step 4: Simplify right side
    13,878.80x = 151,493,041.70
  5. Step 5: Solve for x
    x = 151,493,041.70/13,878.80
  6. Step 6: Final answer
    x = 10,915.43

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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.