Home / 21,312.80-29,424.28-18,948.40

Finding the Fourth Proportional to 21,312.80, 29,424.28 and 18,948.40

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Solution

The fourth proportional to 21,312.80, 29,424.28 and 18,948.40 is: 26,160.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,312.80 : 29,424.28 = 18,948.40 : x
  2. Step 2: Convert to fraction form
    21,312.80/29,424.28 = 18,948.40/x
  3. Step 3: Cross multiply
    21,312.80x = 29,424.28 × 18,948.40
  4. Step 4: Simplify right side
    21,312.80x = 557,543,027.15
  5. Step 5: Solve for x
    x = 557,543,027.15/21,312.80
  6. Step 6: Final answer
    x = 26,160.01

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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.