Home / 20,528.07-28,317.78-13,802.13

Finding the Fourth Proportional to 20,528.07, 28,317.78 and 13,802.13

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Solution

The fourth proportional to 20,528.07, 28,317.78 and 13,802.13 is: 19,039.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,528.07 : 28,317.78 = 13,802.13 : x
  2. Step 2: Convert to fraction form
    20,528.07/28,317.78 = 13,802.13/x
  3. Step 3: Cross multiply
    20,528.07x = 28,317.78 × 13,802.13
  4. Step 4: Simplify right side
    20,528.07x = 390,845,680.87
  5. Step 5: Solve for x
    x = 390,845,680.87/20,528.07
  6. Step 6: Final answer
    x = 19,039.57

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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.