Home / 30,835.40-42,552.80-16,688.20

Finding the Fourth Proportional to 30,835.40, 42,552.80 and 16,688.20

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Solution

The fourth proportional to 30,835.40, 42,552.80 and 16,688.20 is: 23,029.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,835.40 : 42,552.80 = 16,688.20 : x
  2. Step 2: Convert to fraction form
    30,835.40/42,552.80 = 16,688.20/x
  3. Step 3: Cross multiply
    30,835.40x = 42,552.80 × 16,688.20
  4. Step 4: Simplify right side
    30,835.40x = 710,129,636.96
  5. Step 5: Solve for x
    x = 710,129,636.96/30,835.40
  6. Step 6: Final answer
    x = 23,029.69

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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.