Home / 20,985.05-28,959.02-12,032.02

Finding the Fourth Proportional to 20,985.05, 28,959.02 and 12,032.02

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Solution

The fourth proportional to 20,985.05, 28,959.02 and 12,032.02 is: 16,603.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,985.05 : 28,959.02 = 12,032.02 : x
  2. Step 2: Convert to fraction form
    20,985.05/28,959.02 = 12,032.02/x
  3. Step 3: Cross multiply
    20,985.05x = 28,959.02 × 12,032.02
  4. Step 4: Simplify right side
    20,985.05x = 348,435,447.53
  5. Step 5: Solve for x
    x = 348,435,447.53/20,985.05
  6. Step 6: Final answer
    x = 16,603.98

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.