Home / 15,434.49-21,298.55-8,720.40

Finding the Fourth Proportional to 15,434.49, 21,298.55 and 8,720.40

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Solution

The fourth proportional to 15,434.49, 21,298.55 and 8,720.40 is: 12,033.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,434.49 : 21,298.55 = 8,720.40 : x
  2. Step 2: Convert to fraction form
    15,434.49/21,298.55 = 8,720.40/x
  3. Step 3: Cross multiply
    15,434.49x = 21,298.55 × 8,720.40
  4. Step 4: Simplify right side
    15,434.49x = 185,731,831.82
  5. Step 5: Solve for x
    x = 185,731,831.82/15,434.49
  6. Step 6: Final answer
    x = 12,033.56

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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.