Home / 31,126.14-42,953.67-16,978.68

Finding the Fourth Proportional to 31,126.14, 42,953.67 and 16,978.68

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Solution

The fourth proportional to 31,126.14, 42,953.67 and 16,978.68 is: 23,430.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,126.14 : 42,953.67 = 16,978.68 : x
  2. Step 2: Convert to fraction form
    31,126.14/42,953.67 = 16,978.68/x
  3. Step 3: Cross multiply
    31,126.14x = 42,953.67 × 16,978.68
  4. Step 4: Simplify right side
    31,126.14x = 729,296,617.76
  5. Step 5: Solve for x
    x = 729,296,617.76/31,126.14
  6. Step 6: Final answer
    x = 23,430.36

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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.