Home / 20,206.47-27,888.23-15,417.35

Finding the Fourth Proportional to 20,206.47, 27,888.23 and 15,417.35

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Solution

The fourth proportional to 20,206.47, 27,888.23 and 15,417.35 is: 21,278.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,206.47 : 27,888.23 = 15,417.35 : x
  2. Step 2: Convert to fraction form
    20,206.47/27,888.23 = 15,417.35/x
  3. Step 3: Cross multiply
    20,206.47x = 27,888.23 × 15,417.35
  4. Step 4: Simplify right side
    20,206.47x = 429,962,606.47
  5. Step 5: Solve for x
    x = 429,962,606.47/20,206.47
  6. Step 6: Final answer
    x = 21,278.46

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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.