Home / 21,365.13-29,478.84-12,407.32

Finding the Fourth Proportional to 21,365.13, 29,478.84 and 12,407.32

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Solution

The fourth proportional to 21,365.13, 29,478.84 and 12,407.32 is: 17,119.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,365.13 : 29,478.84 = 12,407.32 : x
  2. Step 2: Convert to fraction form
    21,365.13/29,478.84 = 12,407.32/x
  3. Step 3: Cross multiply
    21,365.13x = 29,478.84 × 12,407.32
  4. Step 4: Simplify right side
    21,365.13x = 365,753,253.71
  5. Step 5: Solve for x
    x = 365,753,253.71/21,365.13
  6. Step 6: Final answer
    x = 17,119.17

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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.