Home / 10,139.12-13,985.64-6,156.32

Finding the Fourth Proportional to 10,139.12, 13,985.64 and 6,156.32

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Solution

The fourth proportional to 10,139.12, 13,985.64 and 6,156.32 is: 8,491.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,139.12 : 13,985.64 = 6,156.32 : x
  2. Step 2: Convert to fraction form
    10,139.12/13,985.64 = 6,156.32/x
  3. Step 3: Cross multiply
    10,139.12x = 13,985.64 × 6,156.32
  4. Step 4: Simplify right side
    10,139.12x = 86,100,075.24
  5. Step 5: Solve for x
    x = 86,100,075.24/10,139.12
  6. Step 6: Final answer
    x = 8,491.87

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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.