Home / 13,279.84-18,332.40-7,689.76

Finding the Fourth Proportional to 13,279.84, 18,332.40 and 7,689.76

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Solution

The fourth proportional to 13,279.84, 18,332.40 and 7,689.76 is: 10,615.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,279.84 : 18,332.40 = 7,689.76 : x
  2. Step 2: Convert to fraction form
    13,279.84/18,332.40 = 7,689.76/x
  3. Step 3: Cross multiply
    13,279.84x = 18,332.40 × 7,689.76
  4. Step 4: Simplify right side
    13,279.84x = 140,971,756.22
  5. Step 5: Solve for x
    x = 140,971,756.22/13,279.84
  6. Step 6: Final answer
    x = 10,615.47

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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.