Home / 18,427.91-25,421.45-12,457.40

Finding the Fourth Proportional to 18,427.91, 25,421.45 and 12,457.40

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Solution

The fourth proportional to 18,427.91, 25,421.45 and 12,457.40 is: 17,185.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,427.91 : 25,421.45 = 12,457.40 : x
  2. Step 2: Convert to fraction form
    18,427.91/25,421.45 = 12,457.40/x
  3. Step 3: Cross multiply
    18,427.91x = 25,421.45 × 12,457.40
  4. Step 4: Simplify right side
    18,427.91x = 316,684,981.84
  5. Step 5: Solve for x
    x = 316,684,981.84/18,427.91
  6. Step 6: Final answer
    x = 17,185.08

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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.