Home / 20,316.80-28,038.08-11,364.28

Finding the Fourth Proportional to 20,316.80, 28,038.08 and 11,364.28

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Solution

The fourth proportional to 20,316.80, 28,038.08 and 11,364.28 is: 15,683.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,316.80 : 28,038.08 = 11,364.28 : x
  2. Step 2: Convert to fraction form
    20,316.80/28,038.08 = 11,364.28/x
  3. Step 3: Cross multiply
    20,316.80x = 28,038.08 × 11,364.28
  4. Step 4: Simplify right side
    20,316.80x = 318,632,591.78
  5. Step 5: Solve for x
    x = 318,632,591.78/20,316.80
  6. Step 6: Final answer
    x = 15,683.21

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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.