Home / 31,780.49-47,686.13-13,074.35

Finding the Fourth Proportional to 31,780.49, 47,686.13 and 13,074.35

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Solution

The fourth proportional to 31,780.49, 47,686.13 and 13,074.35 is: 19,617.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,780.49 : 47,686.13 = 13,074.35 : x
  2. Step 2: Convert to fraction form
    31,780.49/47,686.13 = 13,074.35/x
  3. Step 3: Cross multiply
    31,780.49x = 47,686.13 × 13,074.35
  4. Step 4: Simplify right side
    31,780.49x = 623,465,088.39
  5. Step 5: Solve for x
    x = 623,465,088.39/31,780.49
  6. Step 6: Final answer
    x = 19,617.86

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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.