Home / 21,985.95-30,338.81-12,426.65

Finding the Fourth Proportional to 21,985.95, 30,338.81 and 12,426.65

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Solution

The fourth proportional to 21,985.95, 30,338.81 and 12,426.65 is: 17,147.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,985.95 : 30,338.81 = 12,426.65 : x
  2. Step 2: Convert to fraction form
    21,985.95/30,338.81 = 12,426.65/x
  3. Step 3: Cross multiply
    21,985.95x = 30,338.81 × 12,426.65
  4. Step 4: Simplify right side
    21,985.95x = 377,009,787.00
  5. Step 5: Solve for x
    x = 377,009,787.00/21,985.95
  6. Step 6: Final answer
    x = 17,147.76

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.