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Finding the Fourth Proportional to 15,688.50, 21,652.05 and 9,064.50

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Solution

The fourth proportional to 15,688.50, 21,652.05 and 9,064.50 is: 12,510.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,688.50 : 21,652.05 = 9,064.50 : x
  2. Step 2: Convert to fraction form
    15,688.50/21,652.05 = 9,064.50/x
  3. Step 3: Cross multiply
    15,688.50x = 21,652.05 × 9,064.50
  4. Step 4: Simplify right side
    15,688.50x = 196,265,007.23
  5. Step 5: Solve for x
    x = 196,265,007.23/15,688.50
  6. Step 6: Final answer
    x = 12,510.12

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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.