Home / 19,905.17-27,457.71-12,440.21

Finding the Fourth Proportional to 19,905.17, 27,457.71 and 12,440.21

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Solution

The fourth proportional to 19,905.17, 27,457.71 and 12,440.21 is: 17,160.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,905.17 : 27,457.71 = 12,440.21 : x
  2. Step 2: Convert to fraction form
    19,905.17/27,457.71 = 12,440.21/x
  3. Step 3: Cross multiply
    19,905.17x = 27,457.71 × 12,440.21
  4. Step 4: Simplify right side
    19,905.17x = 341,579,541.23
  5. Step 5: Solve for x
    x = 341,579,541.23/19,905.17
  6. Step 6: Final answer
    x = 17,160.35

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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.