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Finding the Fourth Proportional to 15,008.48, 20,710.14 and 8,722.16

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Solution

The fourth proportional to 15,008.48, 20,710.14 and 8,722.16 is: 12,035.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,008.48 : 20,710.14 = 8,722.16 : x
  2. Step 2: Convert to fraction form
    15,008.48/20,710.14 = 8,722.16/x
  3. Step 3: Cross multiply
    15,008.48x = 20,710.14 × 8,722.16
  4. Step 4: Simplify right side
    15,008.48x = 180,637,154.70
  5. Step 5: Solve for x
    x = 180,637,154.70/15,008.48
  6. Step 6: Final answer
    x = 12,035.67

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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.