Home / 20,328.57-28,054.60-11,376.00

Finding the Fourth Proportional to 20,328.57, 28,054.60 and 11,376.00

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Solution

The fourth proportional to 20,328.57, 28,054.60 and 11,376.00 is: 15,699.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,328.57 : 28,054.60 = 11,376.00 : x
  2. Step 2: Convert to fraction form
    20,328.57/28,054.60 = 11,376.00/x
  3. Step 3: Cross multiply
    20,328.57x = 28,054.60 × 11,376.00
  4. Step 4: Simplify right side
    20,328.57x = 319,148,989.33
  5. Step 5: Solve for x
    x = 319,148,989.33/20,328.57
  6. Step 6: Final answer
    x = 15,699.53

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1.5x scale

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.