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Finding the Fourth Proportional to 28,009.40, 39,329.80 and 28,009.40

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Solution

The fourth proportional to 28,009.40, 39,329.80 and 28,009.40 is: 39,329.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,009.40 : 39,329.80 = 28,009.40 : x
  2. Step 2: Convert to fraction form
    28,009.40/39,329.80 = 28,009.40/x
  3. Step 3: Cross multiply
    28,009.40x = 39,329.80 × 28,009.40
  4. Step 4: Simplify right side
    28,009.40x = 1,101,604,100.12
  5. Step 5: Solve for x
    x = 1,101,604,100.12/28,009.40
  6. Step 6: Final answer
    x = 39,329.80

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.