Home / 30,858.64-42,577.79-18,111.20

Finding the Fourth Proportional to 30,858.64, 42,577.79 and 18,111.20

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Solution

The fourth proportional to 30,858.64, 42,577.79 and 18,111.20 is: 24,989.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,858.64 : 42,577.79 = 18,111.20 : x
  2. Step 2: Convert to fraction form
    30,858.64/42,577.79 = 18,111.20/x
  3. Step 3: Cross multiply
    30,858.64x = 42,577.79 × 18,111.20
  4. Step 4: Simplify right side
    30,858.64x = 771,134,566.80
  5. Step 5: Solve for x
    x = 771,134,566.80/30,858.64
  6. Step 6: Final answer
    x = 24,989.26

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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.