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Finding the Fourth Proportional to 18,875.70, 26,052.30 and 10,918.80

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Solution

The fourth proportional to 18,875.70, 26,052.30 and 10,918.80 is: 15,070.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,875.70 : 26,052.30 = 10,918.80 : x
  2. Step 2: Convert to fraction form
    18,875.70/26,052.30 = 10,918.80/x
  3. Step 3: Cross multiply
    18,875.70x = 26,052.30 × 10,918.80
  4. Step 4: Simplify right side
    18,875.70x = 284,459,853.24
  5. Step 5: Solve for x
    x = 284,459,853.24/18,875.70
  6. Step 6: Final answer
    x = 15,070.16

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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.