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Finding the Fourth Proportional to 12,603.87, 18,905.16 and 4,705.76

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Solution

The fourth proportional to 12,603.87, 18,905.16 and 4,705.76 is: 7,058.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,603.87 : 18,905.16 = 4,705.76 : x
  2. Step 2: Convert to fraction form
    12,603.87/18,905.16 = 4,705.76/x
  3. Step 3: Cross multiply
    12,603.87x = 18,905.16 × 4,705.76
  4. Step 4: Simplify right side
    12,603.87x = 88,963,210.63
  5. Step 5: Solve for x
    x = 88,963,210.63/12,603.87
  6. Step 6: Final answer
    x = 7,058.40

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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.