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Finding the Fourth Proportional to 42,980.46, 64,471.11 and 12,994.93

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Solution

The fourth proportional to 42,980.46, 64,471.11 and 12,994.93 is: 19,492.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,980.46 : 64,471.11 = 12,994.93 : x
  2. Step 2: Convert to fraction form
    42,980.46/64,471.11 = 12,994.93/x
  3. Step 3: Cross multiply
    42,980.46x = 64,471.11 × 12,994.93
  4. Step 4: Simplify right side
    42,980.46x = 837,797,593.33
  5. Step 5: Solve for x
    x = 837,797,593.33/42,980.46
  6. Step 6: Final answer
    x = 19,492.52

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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.