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Finding the Fourth Proportional to 15,203.76, 21,038.70 and 12,962.08

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Solution

The fourth proportional to 15,203.76, 21,038.70 and 12,962.08 is: 17,936.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,203.76 : 21,038.70 = 12,962.08 : x
  2. Step 2: Convert to fraction form
    15,203.76/21,038.70 = 12,962.08/x
  3. Step 3: Cross multiply
    15,203.76x = 21,038.70 × 12,962.08
  4. Step 4: Simplify right side
    15,203.76x = 272,705,312.50
  5. Step 5: Solve for x
    x = 272,705,312.50/15,203.76
  6. Step 6: Final answer
    x = 17,936.71

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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.