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Finding the Fourth Proportional to 42,751.40, 64,130.74 and 11,165.66

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Solution

The fourth proportional to 42,751.40, 64,130.74 and 11,165.66 is: 16,749.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,751.40 : 64,130.74 = 11,165.66 : x
  2. Step 2: Convert to fraction form
    42,751.40/64,130.74 = 11,165.66/x
  3. Step 3: Cross multiply
    42,751.40x = 64,130.74 × 11,165.66
  4. Step 4: Simplify right side
    42,751.40x = 716,062,038.39
  5. Step 5: Solve for x
    x = 716,062,038.39/42,751.40
  6. Step 6: Final answer
    x = 16,749.44

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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.