Home / 13,749.86-18,973.76-7,780.16

Finding the Fourth Proportional to 13,749.86, 18,973.76 and 7,780.16

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Solution

The fourth proportional to 13,749.86, 18,973.76 and 7,780.16 is: 10,736.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,749.86 : 18,973.76 = 7,780.16 : x
  2. Step 2: Convert to fraction form
    13,749.86/18,973.76 = 7,780.16/x
  3. Step 3: Cross multiply
    13,749.86x = 18,973.76 × 7,780.16
  4. Step 4: Simplify right side
    13,749.86x = 147,618,888.60
  5. Step 5: Solve for x
    x = 147,618,888.60/13,749.86
  6. Step 6: Final answer
    x = 10,736.03

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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.