Home / 31,125.40-42,953.26-16,978.34

Finding the Fourth Proportional to 31,125.40, 42,953.26 and 16,978.34

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Solution

The fourth proportional to 31,125.40, 42,953.26 and 16,978.34 is: 23,430.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,125.40 : 42,953.26 = 16,978.34 : x
  2. Step 2: Convert to fraction form
    31,125.40/42,953.26 = 16,978.34/x
  3. Step 3: Cross multiply
    31,125.40x = 42,953.26 × 16,978.34
  4. Step 4: Simplify right side
    31,125.40x = 729,275,052.39
  5. Step 5: Solve for x
    x = 729,275,052.39/31,125.40
  6. Step 6: Final answer
    x = 23,430.22

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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.