Home / 15,220.87-21,018.18-9,565.45

Finding the Fourth Proportional to 15,220.87, 21,018.18 and 9,565.45

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Solution

The fourth proportional to 15,220.87, 21,018.18 and 9,565.45 is: 13,208.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,220.87 : 21,018.18 = 9,565.45 : x
  2. Step 2: Convert to fraction form
    15,220.87/21,018.18 = 9,565.45/x
  3. Step 3: Cross multiply
    15,220.87x = 21,018.18 × 9,565.45
  4. Step 4: Simplify right side
    15,220.87x = 201,048,349.88
  5. Step 5: Solve for x
    x = 201,048,349.88/15,220.87
  6. Step 6: Final answer
    x = 13,208.73

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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.