Home / 28,999.68-39,981.48-20,926.56

Finding the Fourth Proportional to 28,999.68, 39,981.48 and 20,926.56

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Solution

The fourth proportional to 28,999.68, 39,981.48 and 20,926.56 is: 28,851.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,999.68 : 39,981.48 = 20,926.56 : x
  2. Step 2: Convert to fraction form
    28,999.68/39,981.48 = 20,926.56/x
  3. Step 3: Cross multiply
    28,999.68x = 39,981.48 × 20,926.56
  4. Step 4: Simplify right side
    28,999.68x = 836,674,840.11
  5. Step 5: Solve for x
    x = 836,674,840.11/28,999.68
  6. Step 6: Final answer
    x = 28,851.17

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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.