Home / 12,905.86-17,810.40-7,316.86

Finding the Fourth Proportional to 12,905.86, 17,810.40 and 7,316.86

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Solution

The fourth proportional to 12,905.86, 17,810.40 and 7,316.86 is: 10,097.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,905.86 : 17,810.40 = 7,316.86 : x
  2. Step 2: Convert to fraction form
    12,905.86/17,810.40 = 7,316.86/x
  3. Step 3: Cross multiply
    12,905.86x = 17,810.40 × 7,316.86
  4. Step 4: Simplify right side
    12,905.86x = 130,316,203.34
  5. Step 5: Solve for x
    x = 130,316,203.34/12,905.86
  6. Step 6: Final answer
    x = 10,097.44

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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.