Home / 15,434.69-21,300.79-8,721.36

Finding the Fourth Proportional to 15,434.69, 21,300.79 and 8,721.36

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Solution

The fourth proportional to 15,434.69, 21,300.79 and 8,721.36 is: 12,036.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,434.69 : 21,300.79 = 8,721.36 : x
  2. Step 2: Convert to fraction form
    15,434.69/21,300.79 = 8,721.36/x
  3. Step 3: Cross multiply
    15,434.69x = 21,300.79 × 8,721.36
  4. Step 4: Simplify right side
    15,434.69x = 185,771,857.87
  5. Step 5: Solve for x
    x = 185,771,857.87/15,434.69
  6. Step 6: Final answer
    x = 12,036.00

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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.