Home / 30,585.01-42,239.40-21,049.53

Finding the Fourth Proportional to 30,585.01, 42,239.40 and 21,049.53

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Solution

The fourth proportional to 30,585.01, 42,239.40 and 21,049.53 is: 29,070.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,585.01 : 42,239.40 = 21,049.53 : x
  2. Step 2: Convert to fraction form
    30,585.01/42,239.40 = 21,049.53/x
  3. Step 3: Cross multiply
    30,585.01x = 42,239.40 × 21,049.53
  4. Step 4: Simplify right side
    30,585.01x = 889,119,517.48
  5. Step 5: Solve for x
    x = 889,119,517.48/30,585.01
  6. Step 6: Final answer
    x = 29,070.43

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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.