Home / 35,678.78-53,518.02-20,981.23

Finding the Fourth Proportional to 35,678.78, 53,518.02 and 20,981.23

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Solution

The fourth proportional to 35,678.78, 53,518.02 and 20,981.23 is: 31,471.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    35,678.78 : 53,518.02 = 20,981.23 : x
  2. Step 2: Convert to fraction form
    35,678.78/53,518.02 = 20,981.23/x
  3. Step 3: Cross multiply
    35,678.78x = 53,518.02 × 20,981.23
  4. Step 4: Simplify right side
    35,678.78x = 1,122,873,674.29
  5. Step 5: Solve for x
    x = 1,122,873,674.29/35,678.78
  6. Step 6: Final answer
    x = 31,471.75

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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.