Finding the Fourth Proportional to 20,538,189.86, 28,344,603.30 and 11,370,832.62
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Solution
The fourth proportional to 20,538,189.86, 28,344,603.30 and 11,370,832.62 is: 15,692,801.65
Step by Step Solution
- Step 1: Write the proportion equation
20,538,189.86 : 28,344,603.30 = 11,370,832.62 : x - Step 2: Convert to fraction form
20,538,189.86/28,344,603.30 = 11,370,832.62/x - Step 3: Cross multiply
20,538,189.86x = 28,344,603.30 × 11,370,832.62 - Step 4: Simplify right side
20,538,189.86x = 322,301,739,804,599.62 - Step 5: Solve for x
x = 322,301,739,804,599.62/20,538,189.86 - Step 6: Final answer
x = 15,692,801.65
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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.