Home / 30,926.78-42,678.95-16,779.61

Finding the Fourth Proportional to 30,926.78, 42,678.95 and 16,779.61

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Solution

The fourth proportional to 30,926.78, 42,678.95 and 16,779.61 is: 23,155.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,926.78 : 42,678.95 = 16,779.61 : x
  2. Step 2: Convert to fraction form
    30,926.78/42,678.95 = 16,779.61/x
  3. Step 3: Cross multiply
    30,926.78x = 42,678.95 × 16,779.61
  4. Step 4: Simplify right side
    30,926.78x = 716,136,136.21
  5. Step 5: Solve for x
    x = 716,136,136.21/30,926.78
  6. Step 6: Final answer
    x = 23,155.86

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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.