Home / 20,569.91-30,848.47-7,420.57

Finding the Fourth Proportional to 20,569.91, 30,848.47 and 7,420.57

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Solution

The fourth proportional to 20,569.91, 30,848.47 and 7,420.57 is: 11,128.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,569.91 : 30,848.47 = 7,420.57 : x
  2. Step 2: Convert to fraction form
    20,569.91/30,848.47 = 7,420.57/x
  3. Step 3: Cross multiply
    20,569.91x = 30,848.47 × 7,420.57
  4. Step 4: Simplify right side
    20,569.91x = 228,913,135.36
  5. Step 5: Solve for x
    x = 228,913,135.36/20,569.91
  6. Step 6: Final answer
    x = 11,128.55

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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.