Home / 42,779.76-64,161-11,615.28

Finding the Fourth Proportional to 42,779.76, 64,161 and 11,615.28

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Solution

The fourth proportional to 42,779.76, 64,161 and 11,615.28 is: 17,420.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,779.76 : 64,161 = 11,615.28 : x
  2. Step 2: Convert to fraction form
    42,779.76/64,161 = 11,615.28/x
  3. Step 3: Cross multiply
    42,779.76x = 64,161 × 11,615.28
  4. Step 4: Simplify right side
    42,779.76x = 745,247,980.08
  5. Step 5: Solve for x
    x = 745,247,980.08/42,779.76
  6. Step 6: Final answer
    x = 17,420.57

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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.