Home / 15,490.83-21,377.28-8,776.44

Finding the Fourth Proportional to 15,490.83, 21,377.28 and 8,776.44

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Solution

The fourth proportional to 15,490.83, 21,377.28 and 8,776.44 is: 12,111.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,490.83 : 21,377.28 = 8,776.44 : x
  2. Step 2: Convert to fraction form
    15,490.83/21,377.28 = 8,776.44/x
  3. Step 3: Cross multiply
    15,490.83x = 21,377.28 × 8,776.44
  4. Step 4: Simplify right side
    15,490.83x = 187,616,415.28
  5. Step 5: Solve for x
    x = 187,616,415.28/15,490.83
  6. Step 6: Final answer
    x = 12,111.45

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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.