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Finding the Fourth Proportional to 15,697.93, 21,664.36 and 8,985.67

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Solution

The fourth proportional to 15,697.93, 21,664.36 and 8,985.67 is: 12,400.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,697.93 : 21,664.36 = 8,985.67 : x
  2. Step 2: Convert to fraction form
    15,697.93/21,664.36 = 8,985.67/x
  3. Step 3: Cross multiply
    15,697.93x = 21,664.36 × 8,985.67
  4. Step 4: Simplify right side
    15,697.93x = 194,668,681.40
  5. Step 5: Solve for x
    x = 194,668,681.40/15,697.93
  6. Step 6: Final answer
    x = 12,400.91

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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.