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Finding the Fourth Proportional to 10,235.40, 15,356.70 and 9,875.40

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Solution

The fourth proportional to 10,235.40, 15,356.70 and 9,875.40 is: 14,816.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,235.40 : 15,356.70 = 9,875.40 : x
  2. Step 2: Convert to fraction form
    10,235.40/15,356.70 = 9,875.40/x
  3. Step 3: Cross multiply
    10,235.40x = 15,356.70 × 9,875.40
  4. Step 4: Simplify right side
    10,235.40x = 151,653,555.18
  5. Step 5: Solve for x
    x = 151,653,555.18/10,235.40
  6. Step 6: Final answer
    x = 14,816.57

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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.