Home / 15,853.05-21,877.02-9,138.69

Finding the Fourth Proportional to 15,853.05, 21,877.02 and 9,138.69

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Solution

The fourth proportional to 15,853.05, 21,877.02 and 9,138.69 is: 12,611.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,853.05 : 21,877.02 = 9,138.69 : x
  2. Step 2: Convert to fraction form
    15,853.05/21,877.02 = 9,138.69/x
  3. Step 3: Cross multiply
    15,853.05x = 21,877.02 × 9,138.69
  4. Step 4: Simplify right side
    15,853.05x = 199,927,303.90
  5. Step 5: Solve for x
    x = 199,927,303.90/15,853.05
  6. Step 6: Final answer
    x = 12,611.28

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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.