Home / 9,865.99-13,615.36-5,389.95

Finding the Fourth Proportional to 9,865.99, 13,615.36 and 5,389.95

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Solution

The fourth proportional to 9,865.99, 13,615.36 and 5,389.95 is: 7,438.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,865.99 : 13,615.36 = 5,389.95 : x
  2. Step 2: Convert to fraction form
    9,865.99/13,615.36 = 5,389.95/x
  3. Step 3: Cross multiply
    9,865.99x = 13,615.36 × 5,389.95
  4. Step 4: Simplify right side
    9,865.99x = 73,386,109.63
  5. Step 5: Solve for x
    x = 73,386,109.63/9,865.99
  6. Step 6: Final answer
    x = 7,438.29

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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.