Home / 30,657.90-42,308.18-18,558.66

Finding the Fourth Proportional to 30,657.90, 42,308.18 and 18,558.66

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Solution

The fourth proportional to 30,657.90, 42,308.18 and 18,558.66 is: 25,611.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,657.90 : 42,308.18 = 18,558.66 : x
  2. Step 2: Convert to fraction form
    30,657.90/42,308.18 = 18,558.66/x
  3. Step 3: Cross multiply
    30,657.90x = 42,308.18 × 18,558.66
  4. Step 4: Simplify right side
    30,657.90x = 785,182,823.50
  5. Step 5: Solve for x
    x = 785,182,823.50/30,657.90
  6. Step 6: Final answer
    x = 25,611.11

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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.