Home / 15,643.80-21,588.56-8,570.20

Finding the Fourth Proportional to 15,643.80, 21,588.56 and 8,570.20

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Solution

The fourth proportional to 15,643.80, 21,588.56 and 8,570.20 is: 11,826.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,643.80 : 21,588.56 = 8,570.20 : x
  2. Step 2: Convert to fraction form
    15,643.80/21,588.56 = 8,570.20/x
  3. Step 3: Cross multiply
    15,643.80x = 21,588.56 × 8,570.20
  4. Step 4: Simplify right side
    15,643.80x = 185,018,276.91
  5. Step 5: Solve for x
    x = 185,018,276.91/15,643.80
  6. Step 6: Final answer
    x = 11,826.94

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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.