Home / 31,130.79-42,960.40-16,983.62

Finding the Fourth Proportional to 31,130.79, 42,960.40 and 16,983.62

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Solution

The fourth proportional to 31,130.79, 42,960.40 and 16,983.62 is: 23,437.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,130.79 : 42,960.40 = 16,983.62 : x
  2. Step 2: Convert to fraction form
    31,130.79/42,960.40 = 16,983.62/x
  3. Step 3: Cross multiply
    31,130.79x = 42,960.40 × 16,983.62
  4. Step 4: Simplify right side
    31,130.79x = 729,623,108.65
  5. Step 5: Solve for x
    x = 729,623,108.65/31,130.79
  6. Step 6: Final answer
    x = 23,437.35

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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.