Home / 30,926.71-42,713.63-20,837.49

Finding the Fourth Proportional to 30,926.71, 42,713.63 and 20,837.49

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Solution

The fourth proportional to 30,926.71, 42,713.63 and 20,837.49 is: 28,779.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,926.71 : 42,713.63 = 20,837.49 : x
  2. Step 2: Convert to fraction form
    30,926.71/42,713.63 = 20,837.49/x
  3. Step 3: Cross multiply
    30,926.71x = 42,713.63 × 20,837.49
  4. Step 4: Simplify right side
    30,926.71x = 890,044,837.99
  5. Step 5: Solve for x
    x = 890,044,837.99/30,926.71
  6. Step 6: Final answer
    x = 28,779.16

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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.