Home / 15,740.13-21,721.65-8,570.25

Finding the Fourth Proportional to 15,740.13, 21,721.65 and 8,570.25

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Solution

The fourth proportional to 15,740.13, 21,721.65 and 8,570.25 is: 11,827.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,740.13 : 21,721.65 = 8,570.25 : x
  2. Step 2: Convert to fraction form
    15,740.13/21,721.65 = 8,570.25/x
  3. Step 3: Cross multiply
    15,740.13x = 21,721.65 × 8,570.25
  4. Step 4: Simplify right side
    15,740.13x = 186,159,970.91
  5. Step 5: Solve for x
    x = 186,159,970.91/15,740.13
  6. Step 6: Final answer
    x = 11,827.09

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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.