Home / 15,716.40-21,681.36-9,417.84

Finding the Fourth Proportional to 15,716.40, 21,681.36 and 9,417.84

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Solution

The fourth proportional to 15,716.40, 21,681.36 and 9,417.84 is: 12,992.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,716.40 : 21,681.36 = 9,417.84 : x
  2. Step 2: Convert to fraction form
    15,716.40/21,681.36 = 9,417.84/x
  3. Step 3: Cross multiply
    15,716.40x = 21,681.36 × 9,417.84
  4. Step 4: Simplify right side
    15,716.40x = 204,191,579.46
  5. Step 5: Solve for x
    x = 204,191,579.46/15,716.40
  6. Step 6: Final answer
    x = 12,992.26

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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.