Home / 10,130.28-13,985.64-7,721.34

Finding the Fourth Proportional to 10,130.28, 13,985.64 and 7,721.34

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Solution

The fourth proportional to 10,130.28, 13,985.64 and 7,721.34 is: 10,659.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,130.28 : 13,985.64 = 7,721.34 : x
  2. Step 2: Convert to fraction form
    10,130.28/13,985.64 = 7,721.34/x
  3. Step 3: Cross multiply
    10,130.28x = 13,985.64 × 7,721.34
  4. Step 4: Simplify right side
    10,130.28x = 107,987,881.56
  5. Step 5: Solve for x
    x = 107,987,881.56/10,130.28
  6. Step 6: Final answer
    x = 10,659.91

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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.