Home / 30,492.78-42,033.48-21,991.02

Finding the Fourth Proportional to 30,492.78, 42,033.48 and 21,991.02

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Solution

The fourth proportional to 30,492.78, 42,033.48 and 21,991.02 is: 30,314.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,492.78 : 42,033.48 = 21,991.02 : x
  2. Step 2: Convert to fraction form
    30,492.78/42,033.48 = 21,991.02/x
  3. Step 3: Cross multiply
    30,492.78x = 42,033.48 × 21,991.02
  4. Step 4: Simplify right side
    30,492.78x = 924,359,099.35
  5. Step 5: Solve for x
    x = 924,359,099.35/30,492.78
  6. Step 6: Final answer
    x = 30,314.03

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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.