Home / 10,985.49-15,160.05-6,511.47

Finding the Fourth Proportional to 10,985.49, 15,160.05 and 6,511.47

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Solution

The fourth proportional to 10,985.49, 15,160.05 and 6,511.47 is: 8,985.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,985.49 : 15,160.05 = 6,511.47 : x
  2. Step 2: Convert to fraction form
    10,985.49/15,160.05 = 6,511.47/x
  3. Step 3: Cross multiply
    10,985.49x = 15,160.05 × 6,511.47
  4. Step 4: Simplify right side
    10,985.49x = 98,714,210.77
  5. Step 5: Solve for x
    x = 98,714,210.77/10,985.49
  6. Step 6: Final answer
    x = 8,985.87

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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.