Home / 18,939.49-26,130.70-10,980.12

Finding the Fourth Proportional to 18,939.49, 26,130.70 and 10,980.12

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Solution

The fourth proportional to 18,939.49, 26,130.70 and 10,980.12 is: 15,149.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,939.49 : 26,130.70 = 10,980.12 : x
  2. Step 2: Convert to fraction form
    18,939.49/26,130.70 = 10,980.12/x
  3. Step 3: Cross multiply
    18,939.49x = 26,130.70 × 10,980.12
  4. Step 4: Simplify right side
    18,939.49x = 286,918,330.83
  5. Step 5: Solve for x
    x = 286,918,330.83/18,939.49
  6. Step 6: Final answer
    x = 15,149.21

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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.