Home / 20,870.30-28,784.26-18,347.06

Finding the Fourth Proportional to 20,870.30, 28,784.26 and 18,347.06

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Solution

The fourth proportional to 20,870.30, 28,784.26 and 18,347.06 is: 25,304.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,870.30 : 28,784.26 = 18,347.06 : x
  2. Step 2: Convert to fraction form
    20,870.30/28,784.26 = 18,347.06/x
  3. Step 3: Cross multiply
    20,870.30x = 28,784.26 × 18,347.06
  4. Step 4: Simplify right side
    20,870.30x = 528,106,545.28
  5. Step 5: Solve for x
    x = 528,106,545.28/20,870.30
  6. Step 6: Final answer
    x = 25,304.21

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