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Finding the Fourth Proportional to 19,490.78, 26,899.59 and 11,533.01

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Solution

The fourth proportional to 19,490.78, 26,899.59 and 11,533.01 is: 15,916.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,490.78 : 26,899.59 = 11,533.01 : x
  2. Step 2: Convert to fraction form
    19,490.78/26,899.59 = 11,533.01/x
  3. Step 3: Cross multiply
    19,490.78x = 26,899.59 × 11,533.01
  4. Step 4: Simplify right side
    19,490.78x = 310,233,151.89
  5. Step 5: Solve for x
    x = 310,233,151.89/19,490.78
  6. Step 6: Final answer
    x = 15,916.92

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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.