Home / 28,687.30-42,970.47-13,118.02

Finding the Fourth Proportional to 28,687.30, 42,970.47 and 13,118.02

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Solution

The fourth proportional to 28,687.30, 42,970.47 and 13,118.02 is: 19,649.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,687.30 : 42,970.47 = 13,118.02 : x
  2. Step 2: Convert to fraction form
    28,687.30/42,970.47 = 13,118.02/x
  3. Step 3: Cross multiply
    28,687.30x = 42,970.47 × 13,118.02
  4. Step 4: Simplify right side
    28,687.30x = 563,687,484.87
  5. Step 5: Solve for x
    x = 563,687,484.87/28,687.30
  6. Step 6: Final answer
    x = 19,649.37

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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.