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Finding the Fourth Proportional to 15,018.51, 20,723.95 and 8,303.05

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Solution

The fourth proportional to 15,018.51, 20,723.95 and 8,303.05 is: 11,457.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,018.51 : 20,723.95 = 8,303.05 : x
  2. Step 2: Convert to fraction form
    15,018.51/20,723.95 = 8,303.05/x
  3. Step 3: Cross multiply
    15,018.51x = 20,723.95 × 8,303.05
  4. Step 4: Simplify right side
    15,018.51x = 172,071,993.05
  5. Step 5: Solve for x
    x = 172,071,993.05/15,018.51
  6. Step 6: Final answer
    x = 11,457.33

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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.