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Finding the Fourth Proportional to 10,509.47, 15,717.73 and 9,347.63

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Solution

The fourth proportional to 10,509.47, 15,717.73 and 9,347.63 is: 13,980.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,509.47 : 15,717.73 = 9,347.63 : x
  2. Step 2: Convert to fraction form
    10,509.47/15,717.73 = 9,347.63/x
  3. Step 3: Cross multiply
    10,509.47x = 15,717.73 × 9,347.63
  4. Step 4: Simplify right side
    10,509.47x = 146,923,524.48
  5. Step 5: Solve for x
    x = 146,923,524.48/10,509.47
  6. Step 6: Final answer
    x = 13,980.11

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.