Home / 15,415.49-21,272.35-8,701.40

Finding the Fourth Proportional to 15,415.49, 21,272.35 and 8,701.40

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Solution

The fourth proportional to 15,415.49, 21,272.35 and 8,701.40 is: 12,007.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,415.49 : 21,272.35 = 8,701.40 : x
  2. Step 2: Convert to fraction form
    15,415.49/21,272.35 = 8,701.40/x
  3. Step 3: Cross multiply
    15,415.49x = 21,272.35 × 8,701.40
  4. Step 4: Simplify right side
    15,415.49x = 185,099,226.29
  5. Step 5: Solve for x
    x = 185,099,226.29/15,415.49
  6. Step 6: Final answer
    x = 12,007.35

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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.