Home / 15,457.92-21,328.32-9,870.72

Finding the Fourth Proportional to 15,457.92, 21,328.32 and 9,870.72

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Solution

The fourth proportional to 15,457.92, 21,328.32 and 9,870.72 is: 13,619.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,457.92 : 21,328.32 = 9,870.72 : x
  2. Step 2: Convert to fraction form
    15,457.92/21,328.32 = 9,870.72/x
  3. Step 3: Cross multiply
    15,457.92x = 21,328.32 × 9,870.72
  4. Step 4: Simplify right side
    15,457.92x = 210,525,874.79
  5. Step 5: Solve for x
    x = 210,525,874.79/15,457.92
  6. Step 6: Final answer
    x = 13,619.29

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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.