Home / 54,218.68-81,312.38-18,678.56

Finding the Fourth Proportional to 54,218.68, 81,312.38 and 18,678.56

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Solution

The fourth proportional to 54,218.68, 81,312.38 and 18,678.56 is: 28,012.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,218.68 : 81,312.38 = 18,678.56 : x
  2. Step 2: Convert to fraction form
    54,218.68/81,312.38 = 18,678.56/x
  3. Step 3: Cross multiply
    54,218.68x = 81,312.38 × 18,678.56
  4. Step 4: Simplify right side
    54,218.68x = 1,518,798,168.57
  5. Step 5: Solve for x
    x = 1,518,798,168.57/54,218.68
  6. Step 6: Final answer
    x = 28,012.45

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.