Home / 35,678.91-53,518.49-11,985.78

Finding the Fourth Proportional to 35,678.91, 53,518.49 and 11,985.78

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Solution

The fourth proportional to 35,678.91, 53,518.49 and 11,985.78 is: 17,978.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    35,678.91 : 53,518.49 = 11,985.78 : x
  2. Step 2: Convert to fraction form
    35,678.91/53,518.49 = 11,985.78/x
  3. Step 3: Cross multiply
    35,678.91x = 53,518.49 × 11,985.78
  4. Step 4: Simplify right side
    35,678.91x = 641,460,847.07
  5. Step 5: Solve for x
    x = 641,460,847.07/35,678.91
  6. Step 6: Final answer
    x = 17,978.71

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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.