Home / 13,916.02-19,213.06-12,421.40

Finding the Fourth Proportional to 13,916.02, 19,213.06 and 12,421.40

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Solution

The fourth proportional to 13,916.02, 19,213.06 and 12,421.40 is: 17,149.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,916.02 : 19,213.06 = 12,421.40 : x
  2. Step 2: Convert to fraction form
    13,916.02/19,213.06 = 12,421.40/x
  3. Step 3: Cross multiply
    13,916.02x = 19,213.06 × 12,421.40
  4. Step 4: Simplify right side
    13,916.02x = 238,653,103.48
  5. Step 5: Solve for x
    x = 238,653,103.48/13,916.02
  6. Step 6: Final answer
    x = 17,149.52

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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.