Home / 15,543.81-21,450.15-8,470.28

Finding the Fourth Proportional to 15,543.81, 21,450.15 and 8,470.28

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Solution

The fourth proportional to 15,543.81, 21,450.15 and 8,470.28 is: 11,688.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,543.81 : 21,450.15 = 8,470.28 : x
  2. Step 2: Convert to fraction form
    15,543.81/21,450.15 = 8,470.28/x
  3. Step 3: Cross multiply
    15,543.81x = 21,450.15 × 8,470.28
  4. Step 4: Simplify right side
    15,543.81x = 181,688,830.17
  5. Step 5: Solve for x
    x = 181,688,830.17/15,543.81
  6. Step 6: Final answer
    x = 11,688.82

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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.