Home / 55,916.08-83,888.64-20,856

Finding the Fourth Proportional to 55,916.08, 83,888.64 and 20,856

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Solution

The fourth proportional to 55,916.08, 83,888.64 and 20,856 is: 31,289.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,916.08 : 83,888.64 = 20,856 : x
  2. Step 2: Convert to fraction form
    55,916.08/83,888.64 = 20,856/x
  3. Step 3: Cross multiply
    55,916.08x = 83,888.64 × 20,856
  4. Step 4: Simplify right side
    55,916.08x = 1,749,581,475.84
  5. Step 5: Solve for x
    x = 1,749,581,475.84/55,916.08
  6. Step 6: Final answer
    x = 31,289.42

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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.