Home / 28,313.04-39,014.40-21,900.69

Finding the Fourth Proportional to 28,313.04, 39,014.40 and 21,900.69

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Solution

The fourth proportional to 28,313.04, 39,014.40 and 21,900.69 is: 30,178.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,313.04 : 39,014.40 = 21,900.69 : x
  2. Step 2: Convert to fraction form
    28,313.04/39,014.40 = 21,900.69/x
  3. Step 3: Cross multiply
    28,313.04x = 39,014.40 × 21,900.69
  4. Step 4: Simplify right side
    28,313.04x = 854,442,279.94
  5. Step 5: Solve for x
    x = 854,442,279.94/28,313.04
  6. Step 6: Final answer
    x = 30,178.40

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Double scale
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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.