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Finding the Fourth Proportional to 28,137.40, 42,206.10 and 7,360.90

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Solution

The fourth proportional to 28,137.40, 42,206.10 and 7,360.90 is: 11,041.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,137.40 : 42,206.10 = 7,360.90 : x
  2. Step 2: Convert to fraction form
    28,137.40/42,206.10 = 7,360.90/x
  3. Step 3: Cross multiply
    28,137.40x = 42,206.10 × 7,360.90
  4. Step 4: Simplify right side
    28,137.40x = 310,674,881.49
  5. Step 5: Solve for x
    x = 310,674,881.49/28,137.40
  6. Step 6: Final answer
    x = 11,041.35

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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.