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Finding the Fourth Proportional to 19,810.78, 27,339.09 and 10,858.08

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Solution

The fourth proportional to 19,810.78, 27,339.09 and 10,858.08 is: 14,984.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,810.78 : 27,339.09 = 10,858.08 : x
  2. Step 2: Convert to fraction form
    19,810.78/27,339.09 = 10,858.08/x
  3. Step 3: Cross multiply
    19,810.78x = 27,339.09 × 10,858.08
  4. Step 4: Simplify right side
    19,810.78x = 296,849,972.06
  5. Step 5: Solve for x
    x = 296,849,972.06/19,810.78
  6. Step 6: Final answer
    x = 14,984.26

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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.