Home / 13,070.90-18,039.40-7,765.74

Finding the Fourth Proportional to 13,070.90, 18,039.40 and 7,765.74

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Solution

The fourth proportional to 13,070.90, 18,039.40 and 7,765.74 is: 10,717.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,070.90 : 18,039.40 = 7,765.74 : x
  2. Step 2: Convert to fraction form
    13,070.90/18,039.40 = 7,765.74/x
  3. Step 3: Cross multiply
    13,070.90x = 18,039.40 × 7,765.74
  4. Step 4: Simplify right side
    13,070.90x = 140,089,270.74
  5. Step 5: Solve for x
    x = 140,089,270.74/13,070.90
  6. Step 6: Final answer
    x = 10,717.64

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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.