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Finding the Fourth Proportional to 15,303.84, 21,119.04 and 9,015.12

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Solution

The fourth proportional to 15,303.84, 21,119.04 and 9,015.12 is: 12,440.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,303.84 : 21,119.04 = 9,015.12 : x
  2. Step 2: Convert to fraction form
    15,303.84/21,119.04 = 9,015.12/x
  3. Step 3: Cross multiply
    15,303.84x = 21,119.04 × 9,015.12
  4. Step 4: Simplify right side
    15,303.84x = 190,390,679.88
  5. Step 5: Solve for x
    x = 190,390,679.88/15,303.84
  6. Step 6: Final answer
    x = 12,440.71

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Half scale
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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.