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Finding the Fourth Proportional to 14,415.60, 21,623.40 and 8,875.20

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Solution

The fourth proportional to 14,415.60, 21,623.40 and 8,875.20 is: 13,312.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,415.60 : 21,623.40 = 8,875.20 : x
  2. Step 2: Convert to fraction form
    14,415.60/21,623.40 = 8,875.20/x
  3. Step 3: Cross multiply
    14,415.60x = 21,623.40 × 8,875.20
  4. Step 4: Simplify right side
    14,415.60x = 191,911,999.68
  5. Step 5: Solve for x
    x = 191,911,999.68/14,415.60
  6. Step 6: Final answer
    x = 13,312.80

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.