Home / 19,877.90-27,420.08-12,412.94

Finding the Fourth Proportional to 19,877.90, 27,420.08 and 12,412.94

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Solution

The fourth proportional to 19,877.90, 27,420.08 and 12,412.94 is: 17,122.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,877.90 : 27,420.08 = 12,412.94 : x
  2. Step 2: Convert to fraction form
    19,877.90/27,420.08 = 12,412.94/x
  3. Step 3: Cross multiply
    19,877.90x = 27,420.08 × 12,412.94
  4. Step 4: Simplify right side
    19,877.90x = 340,363,807.84
  5. Step 5: Solve for x
    x = 340,363,807.84/19,877.90
  6. Step 6: Final answer
    x = 17,122.72

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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.