Home / 15,490.05-21,376.89-8,776.50

Finding the Fourth Proportional to 15,490.05, 21,376.89 and 8,776.50

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Solution

The fourth proportional to 15,490.05, 21,376.89 and 8,776.50 is: 12,111.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,490.05 : 21,376.89 = 8,776.50 : x
  2. Step 2: Convert to fraction form
    15,490.05/21,376.89 = 8,776.50/x
  3. Step 3: Cross multiply
    15,490.05x = 21,376.89 × 8,776.50
  4. Step 4: Simplify right side
    15,490.05x = 187,614,275.09
  5. Step 5: Solve for x
    x = 187,614,275.09/15,490.05
  6. Step 6: Final answer
    x = 12,111.92

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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.