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Finding the Fourth Proportional to 28,650, 39,513.12 and 19,683.12

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Solution

The fourth proportional to 28,650, 39,513.12 and 19,683.12 is: 27,146.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,650 : 39,513.12 = 19,683.12 : x
  2. Step 2: Convert to fraction form
    28,650/39,513.12 = 19,683.12/x
  3. Step 3: Cross multiply
    28,650x = 39,513.12 × 19,683.12
  4. Step 4: Simplify right side
    28,650x = 777,741,482.53
  5. Step 5: Solve for x
    x = 777,741,482.53/28,650
  6. Step 6: Final answer
    x = 27,146.30

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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.