Home / 21,698.57-29,890.48-18,501.45

Finding the Fourth Proportional to 21,698.57, 29,890.48 and 18,501.45

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Solution

The fourth proportional to 21,698.57, 29,890.48 and 18,501.45 is: 25,486.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,698.57 : 29,890.48 = 18,501.45 : x
  2. Step 2: Convert to fraction form
    21,698.57/29,890.48 = 18,501.45/x
  3. Step 3: Cross multiply
    21,698.57x = 29,890.48 × 18,501.45
  4. Step 4: Simplify right side
    21,698.57x = 553,017,221.20
  5. Step 5: Solve for x
    x = 553,017,221.20/21,698.57
  6. Step 6: Final answer
    x = 25,486.34

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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.