Home / 18,918.95-26,108.73-10,421.34

Finding the Fourth Proportional to 18,918.95, 26,108.73 and 10,421.34

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Solution

The fourth proportional to 18,918.95, 26,108.73 and 10,421.34 is: 14,381.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,918.95 : 26,108.73 = 10,421.34 : x
  2. Step 2: Convert to fraction form
    18,918.95/26,108.73 = 10,421.34/x
  3. Step 3: Cross multiply
    18,918.95x = 26,108.73 × 10,421.34
  4. Step 4: Simplify right side
    18,918.95x = 272,087,854.39
  5. Step 5: Solve for x
    x = 272,087,854.39/18,918.95
  6. Step 6: Final answer
    x = 14,381.77

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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.