Home / 42,900.84-64,357.20-13,320.90

Finding the Fourth Proportional to 42,900.84, 64,357.20 and 13,320.90

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Solution

The fourth proportional to 42,900.84, 64,357.20 and 13,320.90 is: 19,983.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,900.84 : 64,357.20 = 13,320.90 : x
  2. Step 2: Convert to fraction form
    42,900.84/64,357.20 = 13,320.90/x
  3. Step 3: Cross multiply
    42,900.84x = 64,357.20 × 13,320.90
  4. Step 4: Simplify right side
    42,900.84x = 857,295,825.48
  5. Step 5: Solve for x
    x = 857,295,825.48/42,900.84
  6. Step 6: Final answer
    x = 19,983.19

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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.