Home / 15,643.01-21,578.64-9,670.47

Finding the Fourth Proportional to 15,643.01, 21,578.64 and 9,670.47

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Solution

The fourth proportional to 15,643.01, 21,578.64 and 9,670.47 is: 13,339.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,643.01 : 21,578.64 = 9,670.47 : x
  2. Step 2: Convert to fraction form
    15,643.01/21,578.64 = 9,670.47/x
  3. Step 3: Cross multiply
    15,643.01x = 21,578.64 × 9,670.47
  4. Step 4: Simplify right side
    15,643.01x = 208,675,590.76
  5. Step 5: Solve for x
    x = 208,675,590.76/15,643.01
  6. Step 6: Final answer
    x = 13,339.87

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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.