Home / 28,365.12-42,484.32-20,556

Finding the Fourth Proportional to 28,365.12, 42,484.32 and 20,556

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Solution

The fourth proportional to 28,365.12, 42,484.32 and 20,556 is: 30,788.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,365.12 : 42,484.32 = 20,556 : x
  2. Step 2: Convert to fraction form
    28,365.12/42,484.32 = 20,556/x
  3. Step 3: Cross multiply
    28,365.12x = 42,484.32 × 20,556
  4. Step 4: Simplify right side
    28,365.12x = 873,307,681.92
  5. Step 5: Solve for x
    x = 873,307,681.92/28,365.12
  6. Step 6: Final answer
    x = 30,788.08

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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.