Home / 15,513.17-21,406.28-8,798.46

Finding the Fourth Proportional to 15,513.17, 21,406.28 and 8,798.46

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Solution

The fourth proportional to 15,513.17, 21,406.28 and 8,798.46 is: 12,140.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,513.17 : 21,406.28 = 8,798.46 : x
  2. Step 2: Convert to fraction form
    15,513.17/21,406.28 = 8,798.46/x
  3. Step 3: Cross multiply
    15,513.17x = 21,406.28 × 8,798.46
  4. Step 4: Simplify right side
    15,513.17x = 188,342,254.34
  5. Step 5: Solve for x
    x = 188,342,254.34/15,513.17
  6. Step 6: Final answer
    x = 12,140.80

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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.