Home / 31,117.60-42,942.86-16,970.40

Finding the Fourth Proportional to 31,117.60, 42,942.86 and 16,970.40

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Solution

The fourth proportional to 31,117.60, 42,942.86 and 16,970.40 is: 23,419.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,117.60 : 42,942.86 = 16,970.40 : x
  2. Step 2: Convert to fraction form
    31,117.60/42,942.86 = 16,970.40/x
  3. Step 3: Cross multiply
    31,117.60x = 42,942.86 × 16,970.40
  4. Step 4: Simplify right side
    31,117.60x = 728,757,511.34
  5. Step 5: Solve for x
    x = 728,757,511.34/31,117.60
  6. Step 6: Final answer
    x = 23,419.46

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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.