Home / 15,670.68-21,629.28-10,643.28

Finding the Fourth Proportional to 15,670.68, 21,629.28 and 10,643.28

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Solution

The fourth proportional to 15,670.68, 21,629.28 and 10,643.28 is: 14,690.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,670.68 : 21,629.28 = 10,643.28 : x
  2. Step 2: Convert to fraction form
    15,670.68/21,629.28 = 10,643.28/x
  3. Step 3: Cross multiply
    15,670.68x = 21,629.28 × 10,643.28
  4. Step 4: Simplify right side
    15,670.68x = 230,206,483.24
  5. Step 5: Solve for x
    x = 230,206,483.24/15,670.68
  6. Step 6: Final answer
    x = 14,690.27

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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.