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Finding the Fourth Proportional to 18,973.61, 28,462.23 and 7,880.06

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Solution

The fourth proportional to 18,973.61, 28,462.23 and 7,880.06 is: 11,820.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,973.61 : 28,462.23 = 7,880.06 : x
  2. Step 2: Convert to fraction form
    18,973.61/28,462.23 = 7,880.06/x
  3. Step 3: Cross multiply
    18,973.61x = 28,462.23 × 7,880.06
  4. Step 4: Simplify right side
    18,973.61x = 224,283,937.82
  5. Step 5: Solve for x
    x = 224,283,937.82/18,973.61
  6. Step 6: Final answer
    x = 11,820.84

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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.