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Finding the Fourth Proportional to 15,564.16, 21,370.02 and 15,158.22

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Solution

The fourth proportional to 15,564.16, 21,370.02 and 15,158.22 is: 20,812.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,564.16 : 21,370.02 = 15,158.22 : x
  2. Step 2: Convert to fraction form
    15,564.16/21,370.02 = 15,158.22/x
  3. Step 3: Cross multiply
    15,564.16x = 21,370.02 × 15,158.22
  4. Step 4: Simplify right side
    15,564.16x = 323,931,464.56
  5. Step 5: Solve for x
    x = 323,931,464.56/15,564.16
  6. Step 6: Final answer
    x = 20,812.65

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.