Home / 15,163.40-20,931.50-13,030.47

Finding the Fourth Proportional to 15,163.40, 20,931.50 and 13,030.47

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Solution

The fourth proportional to 15,163.40, 20,931.50 and 13,030.47 is: 17,987.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,163.40 : 20,931.50 = 13,030.47 : x
  2. Step 2: Convert to fraction form
    15,163.40/20,931.50 = 13,030.47/x
  3. Step 3: Cross multiply
    15,163.40x = 20,931.50 × 13,030.47
  4. Step 4: Simplify right side
    15,163.40x = 272,747,113.00
  5. Step 5: Solve for x
    x = 272,747,113.00/15,163.40
  6. Step 6: Final answer
    x = 17,987.21

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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.