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Finding the Fourth Proportional to 18,918.76, 26,109.06 and 10,962.04

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Solution

The fourth proportional to 18,918.76, 26,109.06 and 10,962.04 is: 15,128.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,918.76 : 26,109.06 = 10,962.04 : x
  2. Step 2: Convert to fraction form
    18,918.76/26,109.06 = 10,962.04/x
  3. Step 3: Cross multiply
    18,918.76x = 26,109.06 × 10,962.04
  4. Step 4: Simplify right side
    18,918.76x = 286,208,560.08
  5. Step 5: Solve for x
    x = 286,208,560.08/18,918.76
  6. Step 6: Final answer
    x = 15,128.29

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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.