Finding the Fourth Proportional to 20,549,371.05, 28,357,119.99 and 11,256,981.39
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Solution
The fourth proportional to 20,549,371.05, 28,357,119.99 and 11,256,981.39 is: 15,534,079.91
Step by Step Solution
- Step 1: Write the proportion equation
20,549,371.05 : 28,357,119.99 = 11,256,981.39 : x - Step 2: Convert to fraction form
20,549,371.05/28,357,119.99 = 11,256,981.39/x - Step 3: Cross multiply
20,549,371.05x = 28,357,119.99 × 11,256,981.39 - Step 4: Simplify right side
20,549,371.05x = 319,215,572,001,427 - Step 5: Solve for x
x = 319,215,572,001,427/20,549,371.05 - Step 6: Final answer
x = 15,534,079.91
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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.