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Finding the Fourth Proportional to 28,603.53, 42,905.57 and 12,809.34

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Solution

The fourth proportional to 28,603.53, 42,905.57 and 12,809.34 is: 19,214.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,603.53 : 42,905.57 = 12,809.34 : x
  2. Step 2: Convert to fraction form
    28,603.53/42,905.57 = 12,809.34/x
  3. Step 3: Cross multiply
    28,603.53x = 42,905.57 × 12,809.34
  4. Step 4: Simplify right side
    28,603.53x = 549,591,969.98
  5. Step 5: Solve for x
    x = 549,591,969.98/28,603.53
  6. Step 6: Final answer
    x = 19,214.13

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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.