Home / 20,386.16-28,094.80-15,902.80

Finding the Fourth Proportional to 20,386.16, 28,094.80 and 15,902.80

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Solution

The fourth proportional to 20,386.16, 28,094.80 and 15,902.80 is: 21,916.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,386.16 : 28,094.80 = 15,902.80 : x
  2. Step 2: Convert to fraction form
    20,386.16/28,094.80 = 15,902.80/x
  3. Step 3: Cross multiply
    20,386.16x = 28,094.80 × 15,902.80
  4. Step 4: Simplify right side
    20,386.16x = 446,785,985.44
  5. Step 5: Solve for x
    x = 446,785,985.44/20,386.16
  6. Step 6: Final answer
    x = 21,916.14

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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.