Home / 35,386.20-48,830.70-20,278.68

Finding the Fourth Proportional to 35,386.20, 48,830.70 and 20,278.68

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Solution

The fourth proportional to 35,386.20, 48,830.70 and 20,278.68 is: 27,983.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    35,386.20 : 48,830.70 = 20,278.68 : x
  2. Step 2: Convert to fraction form
    35,386.20/48,830.70 = 20,278.68/x
  3. Step 3: Cross multiply
    35,386.20x = 48,830.70 × 20,278.68
  4. Step 4: Simplify right side
    35,386.20x = 990,222,139.48
  5. Step 5: Solve for x
    x = 990,222,139.48/35,386.20
  6. Step 6: Final answer
    x = 27,983.29

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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.