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Finding the Fourth Proportional to 15,770.37, 21,740.47 and 12,407.37

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Solution

The fourth proportional to 15,770.37, 21,740.47 and 12,407.37 is: 17,104.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,770.37 : 21,740.47 = 12,407.37 : x
  2. Step 2: Convert to fraction form
    15,770.37/21,740.47 = 12,407.37/x
  3. Step 3: Cross multiply
    15,770.37x = 21,740.47 × 12,407.37
  4. Step 4: Simplify right side
    15,770.37x = 269,742,055.26
  5. Step 5: Solve for x
    x = 269,742,055.26/15,770.37
  6. Step 6: Final answer
    x = 17,104.36

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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.