Home / 21,315.63-29,417.55-12,242.25

Finding the Fourth Proportional to 21,315.63, 29,417.55 and 12,242.25

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Solution

The fourth proportional to 21,315.63, 29,417.55 and 12,242.25 is: 16,895.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,315.63 : 29,417.55 = 12,242.25 : x
  2. Step 2: Convert to fraction form
    21,315.63/29,417.55 = 12,242.25/x
  3. Step 3: Cross multiply
    21,315.63x = 29,417.55 × 12,242.25
  4. Step 4: Simplify right side
    21,315.63x = 360,137,001.49
  5. Step 5: Solve for x
    x = 360,137,001.49/21,315.63
  6. Step 6: Final answer
    x = 16,895.44

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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.