Home / 30,307.20-45,342-19,939.20

Finding the Fourth Proportional to 30,307.20, 45,342 and 19,939.20

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Solution

The fourth proportional to 30,307.20, 45,342 and 19,939.20 is: 29,830.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,307.20 : 45,342 = 19,939.20 : x
  2. Step 2: Convert to fraction form
    30,307.20/45,342 = 19,939.20/x
  3. Step 3: Cross multiply
    30,307.20x = 45,342 × 19,939.20
  4. Step 4: Simplify right side
    30,307.20x = 904,083,206.40
  5. Step 5: Solve for x
    x = 904,083,206.40/30,307.20
  6. Step 6: Final answer
    x = 29,830.64

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.