Home / 30,440.24-42,034.29-19,129.40

Finding the Fourth Proportional to 30,440.24, 42,034.29 and 19,129.40

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Solution

The fourth proportional to 30,440.24, 42,034.29 and 19,129.40 is: 26,415.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,440.24 : 42,034.29 = 19,129.40 : x
  2. Step 2: Convert to fraction form
    30,440.24/42,034.29 = 19,129.40/x
  3. Step 3: Cross multiply
    30,440.24x = 42,034.29 × 19,129.40
  4. Step 4: Simplify right side
    30,440.24x = 804,090,747.13
  5. Step 5: Solve for x
    x = 804,090,747.13/30,440.24
  6. Step 6: Final answer
    x = 26,415.39

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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.