Home / 30,892.21-42,666.26-20,803.10

Finding the Fourth Proportional to 30,892.21, 42,666.26 and 20,803.10

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Solution

The fourth proportional to 30,892.21, 42,666.26 and 20,803.10 is: 28,731.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,892.21 : 42,666.26 = 20,803.10 : x
  2. Step 2: Convert to fraction form
    30,892.21/42,666.26 = 20,803.10/x
  3. Step 3: Cross multiply
    30,892.21x = 42,666.26 × 20,803.10
  4. Step 4: Simplify right side
    30,892.21x = 887,590,156.06
  5. Step 5: Solve for x
    x = 887,590,156.06/30,892.21
  6. Step 6: Final answer
    x = 28,731.85

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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.