Home / 30,926.40-42,678.66-16,779.36

Finding the Fourth Proportional to 30,926.40, 42,678.66 and 16,779.36

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Solution

The fourth proportional to 30,926.40, 42,678.66 and 16,779.36 is: 23,155.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,926.40 : 42,678.66 = 16,779.36 : x
  2. Step 2: Convert to fraction form
    30,926.40/42,678.66 = 16,779.36/x
  3. Step 3: Cross multiply
    30,926.40x = 42,678.66 × 16,779.36
  4. Step 4: Simplify right side
    30,926.40x = 716,120,600.46
  5. Step 5: Solve for x
    x = 716,120,600.46/30,926.40
  6. Step 6: Final answer
    x = 23,155.64

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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.