Home / 30,999.71-42,779.90-16,852.85

Finding the Fourth Proportional to 30,999.71, 42,779.90 and 16,852.85

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Solution

The fourth proportional to 30,999.71, 42,779.90 and 16,852.85 is: 23,257.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,999.71 : 42,779.90 = 16,852.85 : x
  2. Step 2: Convert to fraction form
    30,999.71/42,779.90 = 16,852.85/x
  3. Step 3: Cross multiply
    30,999.71x = 42,779.90 × 16,852.85
  4. Step 4: Simplify right side
    30,999.71x = 720,963,260.40
  5. Step 5: Solve for x
    x = 720,963,260.40/30,999.71
  6. Step 6: Final answer
    x = 23,257.10

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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.