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Finding the Fourth Proportional to 19,363.66, 26,721.19 and 10,980.16

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Solution

The fourth proportional to 19,363.66, 26,721.19 and 10,980.16 is: 15,152.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,363.66 : 26,721.19 = 10,980.16 : x
  2. Step 2: Convert to fraction form
    19,363.66/26,721.19 = 10,980.16/x
  3. Step 3: Cross multiply
    19,363.66x = 26,721.19 × 10,980.16
  4. Step 4: Simplify right side
    19,363.66x = 293,402,888.51
  5. Step 5: Solve for x
    x = 293,402,888.51/19,363.66
  6. Step 6: Final answer
    x = 15,152.25

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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.