Home / 28,653.12-42,985.83-11,122.95

Finding the Fourth Proportional to 28,653.12, 42,985.83 and 11,122.95

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Solution

The fourth proportional to 28,653.12, 42,985.83 and 11,122.95 is: 16,686.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,653.12 : 42,985.83 = 11,122.95 : x
  2. Step 2: Convert to fraction form
    28,653.12/42,985.83 = 11,122.95/x
  3. Step 3: Cross multiply
    28,653.12x = 42,985.83 × 11,122.95
  4. Step 4: Simplify right side
    28,653.12x = 478,128,999.81
  5. Step 5: Solve for x
    x = 478,128,999.81/28,653.12
  6. Step 6: Final answer
    x = 16,686.81

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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.