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Finding the Fourth Proportional to 15,270, 21,070.12 and 9,303.54

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Solution

The fourth proportional to 15,270, 21,070.12 and 9,303.54 is: 12,837.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,270 : 21,070.12 = 9,303.54 : x
  2. Step 2: Convert to fraction form
    15,270/21,070.12 = 9,303.54/x
  3. Step 3: Cross multiply
    15,270x = 21,070.12 × 9,303.54
  4. Step 4: Simplify right side
    15,270x = 196,026,704.22
  5. Step 5: Solve for x
    x = 196,026,704.22/15,270
  6. Step 6: Final answer
    x = 12,837.37

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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.