Home / 20,667.29-28,534.95-13,871.51

Finding the Fourth Proportional to 20,667.29, 28,534.95 and 13,871.51

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Solution

The fourth proportional to 20,667.29, 28,534.95 and 13,871.51 is: 19,152.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,667.29 : 28,534.95 = 13,871.51 : x
  2. Step 2: Convert to fraction form
    20,667.29/28,534.95 = 13,871.51/x
  3. Step 3: Cross multiply
    20,667.29x = 28,534.95 × 13,871.51
  4. Step 4: Simplify right side
    20,667.29x = 395,822,710.32
  5. Step 5: Solve for x
    x = 395,822,710.32/20,667.29
  6. Step 6: Final answer
    x = 19,152.13

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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.